/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:20:35,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:20:35,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:20:35,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:20:35,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-05-22 02:20:35,879 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:20:35,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:20:35,879 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:20:35,880 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:20:35,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:20:35,882 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:20:35,882 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:20:35,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:20:35,882 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:20:35,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:20:35,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:20:35,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:20:35,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:20:35,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:20:35,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:20:35,883 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:20:35,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:20:35,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:20:35,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:20:35,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:20:35,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:20:35,884 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:20:35,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:20:35,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:20:35,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:20:35,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:20:35,884 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:20:35,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:20:35,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:20:35,885 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:20:35,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:20:35,885 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:20:35,885 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:20:36,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:20:36,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:20:36,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:20:36,156 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:20:36,156 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:20:36,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl [2021-05-22 02:20:36,157 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-opt-symm.wvr.bpl' [2021-05-22 02:20:36,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:20:36,189 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:20:36,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:20:36,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:20:36,197 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:20:36,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:36" (1/1) ... [2021-05-22 02:20:36,212 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:36" (1/1) ... [2021-05-22 02:20:36,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:20:36,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:20:36,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:20:36,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:20:36,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:36" (1/1) ... [2021-05-22 02:20:36,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:36" (1/1) ... [2021-05-22 02:20:36,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:36" (1/1) ... [2021-05-22 02:20:36,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:36" (1/1) ... [2021-05-22 02:20:36,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:36" (1/1) ... [2021-05-22 02:20:36,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:36" (1/1) ... [2021-05-22 02:20:36,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:36" (1/1) ... [2021-05-22 02:20:36,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:20:36,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:20:36,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:20:36,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:20:36,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:20:36,305 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:20:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:20:36,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:20:36,306 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:20:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:20:36,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:20:36,306 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:20:36,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:20:36,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:20:36,307 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:20:36,546 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:20:36,546 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-22 02:20:36,547 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:20:36 BoogieIcfgContainer [2021-05-22 02:20:36,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:20:36,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:20:36,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:20:36,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:20:36,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:20:36" (1/2) ... [2021-05-22 02:20:36,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c002eca and model type chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:20:36, skipping insertion in model container [2021-05-22 02:20:36,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:20:36" (2/2) ... [2021-05-22 02:20:36,552 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-opt-symm.wvr.bpl [2021-05-22 02:20:36,555 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:20:36,555 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:20:36,555 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:20:36,556 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:20:36,574 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-22 02:20:36,596 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:20:36,607 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:20:36,607 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:20:36,608 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:20:36,608 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:20:36,608 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:20:36,608 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:20:36,608 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:20:36,608 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:20:36,613 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-05-22 02:20:36,619 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:36,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 02:20:36,624 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:36,624 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:36,625 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:36,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:36,628 INFO L82 PathProgramCache]: Analyzing trace with hash -715556201, now seen corresponding path program 1 times [2021-05-22 02:20:36,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:36,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599053554] [2021-05-22 02:20:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:36,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:36,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599053554] [2021-05-22 02:20:36,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599053554] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:36,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:36,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:20:36,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954270685] [2021-05-22 02:20:36,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:20:36,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:36,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:20:36,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:20:36,809 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:36,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:36,845 INFO L93 Difference]: Finished difference Result 31 states and 58 transitions. [2021-05-22 02:20:36,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:20:36,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-22 02:20:36,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:36,852 INFO L225 Difference]: With dead ends: 31 [2021-05-22 02:20:36,853 INFO L226 Difference]: Without dead ends: 31 [2021-05-22 02:20:36,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-22 02:20:36,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-22 02:20:36,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 58 transitions. [2021-05-22 02:20:36,884 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 58 transitions. Word has length 12 [2021-05-22 02:20:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:36,884 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 58 transitions. [2021-05-22 02:20:36,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 58 transitions. [2021-05-22 02:20:36,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 02:20:36,885 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:36,886 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:36,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:20:36,886 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:36,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:36,890 INFO L82 PathProgramCache]: Analyzing trace with hash -434812415, now seen corresponding path program 2 times [2021-05-22 02:20:36,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:36,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15831107] [2021-05-22 02:20:36,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:36,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:36,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15831107] [2021-05-22 02:20:36,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15831107] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:36,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:36,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:20:36,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228222709] [2021-05-22 02:20:36,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:20:36,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:36,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:20:36,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:20:36,942 INFO L87 Difference]: Start difference. First operand 31 states and 58 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:36,967 INFO L93 Difference]: Finished difference Result 35 states and 66 transitions. [2021-05-22 02:20:36,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:20:36,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-22 02:20:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:36,969 INFO L225 Difference]: With dead ends: 35 [2021-05-22 02:20:36,969 INFO L226 Difference]: Without dead ends: 35 [2021-05-22 02:20:36,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-22 02:20:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-22 02:20:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:36,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 66 transitions. [2021-05-22 02:20:36,978 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 66 transitions. Word has length 12 [2021-05-22 02:20:36,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:36,978 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 66 transitions. [2021-05-22 02:20:36,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:36,979 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 66 transitions. [2021-05-22 02:20:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:20:36,979 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:36,980 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:36,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:20:36,980 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:36,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:36,982 INFO L82 PathProgramCache]: Analyzing trace with hash 114514857, now seen corresponding path program 1 times [2021-05-22 02:20:36,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:36,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646997044] [2021-05-22 02:20:36,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:37,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:37,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646997044] [2021-05-22 02:20:37,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646997044] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:37,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:37,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:20:37,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473691990] [2021-05-22 02:20:37,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:20:37,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:37,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:20:37,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:37,072 INFO L87 Difference]: Start difference. First operand 35 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:37,116 INFO L93 Difference]: Finished difference Result 56 states and 103 transitions. [2021-05-22 02:20:37,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:20:37,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 02:20:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:37,119 INFO L225 Difference]: With dead ends: 56 [2021-05-22 02:20:37,119 INFO L226 Difference]: Without dead ends: 54 [2021-05-22 02:20:37,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:20:37,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-22 02:20:37,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2021-05-22 02:20:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2021-05-22 02:20:37,134 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 13 [2021-05-22 02:20:37,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:37,135 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2021-05-22 02:20:37,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,135 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2021-05-22 02:20:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:20:37,136 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:37,136 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:37,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:20:37,136 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:37,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:37,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1879146489, now seen corresponding path program 2 times [2021-05-22 02:20:37,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:37,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605246375] [2021-05-22 02:20:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:37,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:37,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605246375] [2021-05-22 02:20:37,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605246375] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:37,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:37,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:20:37,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688926544] [2021-05-22 02:20:37,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:20:37,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:37,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:20:37,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:37,211 INFO L87 Difference]: Start difference. First operand 36 states and 68 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:37,270 INFO L93 Difference]: Finished difference Result 52 states and 97 transitions. [2021-05-22 02:20:37,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:20:37,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 02:20:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:37,273 INFO L225 Difference]: With dead ends: 52 [2021-05-22 02:20:37,273 INFO L226 Difference]: Without dead ends: 52 [2021-05-22 02:20:37,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:20:37,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-22 02:20:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-05-22 02:20:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 70 transitions. [2021-05-22 02:20:37,282 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 70 transitions. Word has length 13 [2021-05-22 02:20:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:37,282 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 70 transitions. [2021-05-22 02:20:37,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 70 transitions. [2021-05-22 02:20:37,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:20:37,282 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:37,283 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:37,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:20:37,283 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:37,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:37,284 INFO L82 PathProgramCache]: Analyzing trace with hash -544555159, now seen corresponding path program 3 times [2021-05-22 02:20:37,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:37,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306111166] [2021-05-22 02:20:37,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:37,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:37,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306111166] [2021-05-22 02:20:37,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306111166] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:37,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:37,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:20:37,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338060135] [2021-05-22 02:20:37,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:20:37,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:37,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:20:37,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:37,380 INFO L87 Difference]: Start difference. First operand 37 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:37,431 INFO L93 Difference]: Finished difference Result 41 states and 78 transitions. [2021-05-22 02:20:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:20:37,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 02:20:37,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:37,432 INFO L225 Difference]: With dead ends: 41 [2021-05-22 02:20:37,432 INFO L226 Difference]: Without dead ends: 41 [2021-05-22 02:20:37,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:20:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-22 02:20:37,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2021-05-22 02:20:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 70 transitions. [2021-05-22 02:20:37,438 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 70 transitions. Word has length 13 [2021-05-22 02:20:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:37,439 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 70 transitions. [2021-05-22 02:20:37,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,439 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 70 transitions. [2021-05-22 02:20:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:20:37,440 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:37,440 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:37,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:20:37,440 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:37,440 INFO L82 PathProgramCache]: Analyzing trace with hash 434832868, now seen corresponding path program 1 times [2021-05-22 02:20:37,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:37,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372316686] [2021-05-22 02:20:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:37,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:37,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:37,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372316686] [2021-05-22 02:20:37,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372316686] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:37,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:37,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:20:37,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495355544] [2021-05-22 02:20:37,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:20:37,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:37,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:20:37,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:20:37,491 INFO L87 Difference]: Start difference. First operand 37 states and 70 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:37,503 INFO L93 Difference]: Finished difference Result 63 states and 115 transitions. [2021-05-22 02:20:37,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:20:37,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 02:20:37,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:37,504 INFO L225 Difference]: With dead ends: 63 [2021-05-22 02:20:37,504 INFO L226 Difference]: Without dead ends: 63 [2021-05-22 02:20:37,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:20:37,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-22 02:20:37,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2021-05-22 02:20:37,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 76 transitions. [2021-05-22 02:20:37,512 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 76 transitions. Word has length 13 [2021-05-22 02:20:37,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:37,512 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 76 transitions. [2021-05-22 02:20:37,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,515 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 76 transitions. [2021-05-22 02:20:37,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:20:37,515 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:37,517 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:37,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:20:37,517 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:37,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:37,517 INFO L82 PathProgramCache]: Analyzing trace with hash 373288736, now seen corresponding path program 2 times [2021-05-22 02:20:37,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:37,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606742426] [2021-05-22 02:20:37,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:20:37,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:37,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606742426] [2021-05-22 02:20:37,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606742426] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:20:37,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:20:37,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-22 02:20:37,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122831722] [2021-05-22 02:20:37,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:20:37,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:37,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:20:37,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:20:37,549 INFO L87 Difference]: Start difference. First operand 39 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:37,571 INFO L93 Difference]: Finished difference Result 44 states and 81 transitions. [2021-05-22 02:20:37,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:20:37,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 02:20:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:37,572 INFO L225 Difference]: With dead ends: 44 [2021-05-22 02:20:37,572 INFO L226 Difference]: Without dead ends: 39 [2021-05-22 02:20:37,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:20:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-22 02:20:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-22 02:20:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-05-22 02:20:37,576 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-05-22 02:20:37,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:37,576 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-05-22 02:20:37,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-05-22 02:20:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:20:37,579 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:37,579 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:37,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:20:37,579 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:37,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:37,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1182521280, now seen corresponding path program 1 times [2021-05-22 02:20:37,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:37,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792643988] [2021-05-22 02:20:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:37,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:37,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792643988] [2021-05-22 02:20:37,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792643988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:37,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495272454] [2021-05-22 02:20:37,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:37,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:20:37,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:38,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495272454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:38,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:38,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-22 02:20:38,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962113260] [2021-05-22 02:20:38,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:20:38,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:38,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:20:38,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:20:38,196 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:38,615 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2021-05-22 02:20:38,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:38,637 INFO L93 Difference]: Finished difference Result 71 states and 127 transitions. [2021-05-22 02:20:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:20:38,637 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:20:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:38,637 INFO L225 Difference]: With dead ends: 71 [2021-05-22 02:20:38,637 INFO L226 Difference]: Without dead ends: 58 [2021-05-22 02:20:38,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 643.9ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:20:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-22 02:20:38,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2021-05-22 02:20:38,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2021-05-22 02:20:38,639 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 14 [2021-05-22 02:20:38,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:38,639 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2021-05-22 02:20:38,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2021-05-22 02:20:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:20:38,640 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:38,640 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:38,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-22 02:20:38,858 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:38,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:38,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1118784670, now seen corresponding path program 2 times [2021-05-22 02:20:38,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:38,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517447205] [2021-05-22 02:20:38,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:39,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:39,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517447205] [2021-05-22 02:20:39,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517447205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:39,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607133712] [2021-05-22 02:20:39,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:39,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:20:39,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:39,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:20:39,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:39,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:39,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607133712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:39,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:39,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-22 02:20:39,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527507905] [2021-05-22 02:20:39,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:20:39,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:39,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:20:39,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:20:39,430 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:39,659 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-05-22 02:20:39,853 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2021-05-22 02:20:40,019 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-05-22 02:20:40,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:40,805 INFO L93 Difference]: Finished difference Result 101 states and 176 transitions. [2021-05-22 02:20:40,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:20:40,807 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:20:40,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:40,808 INFO L225 Difference]: With dead ends: 101 [2021-05-22 02:20:40,808 INFO L226 Difference]: Without dead ends: 80 [2021-05-22 02:20:40,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1537.7ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:20:40,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-22 02:20:40,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 44. [2021-05-22 02:20:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.0) internal successors, (86), 43 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 86 transitions. [2021-05-22 02:20:40,819 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 86 transitions. Word has length 14 [2021-05-22 02:20:40,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:40,819 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 86 transitions. [2021-05-22 02:20:40,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:40,819 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 86 transitions. [2021-05-22 02:20:40,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:20:40,820 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:40,820 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:41,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-22 02:20:41,036 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:41,036 INFO L82 PathProgramCache]: Analyzing trace with hash 531039348, now seen corresponding path program 3 times [2021-05-22 02:20:41,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:41,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976856119] [2021-05-22 02:20:41,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:41,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:41,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976856119] [2021-05-22 02:20:41,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976856119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:41,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293744637] [2021-05-22 02:20:41,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:41,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:20:41,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:41,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:20:41,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:41,573 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-22 02:20:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:41,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293744637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:41,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:41,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-22 02:20:41,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495308439] [2021-05-22 02:20:41,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:20:41,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:41,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:20:41,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:20:41,657 INFO L87 Difference]: Start difference. First operand 44 states and 86 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:42,154 INFO L93 Difference]: Finished difference Result 68 states and 131 transitions. [2021-05-22 02:20:42,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:20:42,155 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:20:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:42,155 INFO L225 Difference]: With dead ends: 68 [2021-05-22 02:20:42,155 INFO L226 Difference]: Without dead ends: 57 [2021-05-22 02:20:42,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 705.0ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:20:42,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-22 02:20:42,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-05-22 02:20:42,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:42,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-05-22 02:20:42,157 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 14 [2021-05-22 02:20:42,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:42,157 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-05-22 02:20:42,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:42,157 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-05-22 02:20:42,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:20:42,158 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:42,158 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:42,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-22 02:20:42,358 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:42,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:42,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1865630678, now seen corresponding path program 4 times [2021-05-22 02:20:42,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:42,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214488920] [2021-05-22 02:20:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:42,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:42,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214488920] [2021-05-22 02:20:42,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214488920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:42,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144794917] [2021-05-22 02:20:42,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:42,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:20:42,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:42,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:20:42,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:43,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144794917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:43,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:43,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:20:43,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105186375] [2021-05-22 02:20:43,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:20:43,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:43,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:20:43,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:20:43,074 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:43,545 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-05-22 02:20:43,671 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-05-22 02:20:43,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:43,781 INFO L93 Difference]: Finished difference Result 99 states and 177 transitions. [2021-05-22 02:20:43,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:20:43,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:20:43,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:43,782 INFO L225 Difference]: With dead ends: 99 [2021-05-22 02:20:43,782 INFO L226 Difference]: Without dead ends: 80 [2021-05-22 02:20:43,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 920.2ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:20:43,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-22 02:20:43,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2021-05-22 02:20:43,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 47 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:43,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 96 transitions. [2021-05-22 02:20:43,784 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 96 transitions. Word has length 14 [2021-05-22 02:20:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:43,784 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 96 transitions. [2021-05-22 02:20:43,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:43,784 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 96 transitions. [2021-05-22 02:20:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:20:43,784 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:43,785 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:43,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-22 02:20:43,985 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:43,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:43,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1327775100, now seen corresponding path program 5 times [2021-05-22 02:20:43,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:43,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742350475] [2021-05-22 02:20:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:44,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:44,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742350475] [2021-05-22 02:20:44,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742350475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:44,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888660525] [2021-05-22 02:20:44,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:44,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:20:44,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:44,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:20:44,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:44,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888660525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:44,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:44,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:20:44,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280183108] [2021-05-22 02:20:44,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:20:44,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:44,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:20:44,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:20:44,408 INFO L87 Difference]: Start difference. First operand 48 states and 96 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:45,116 INFO L93 Difference]: Finished difference Result 110 states and 208 transitions. [2021-05-22 02:20:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:20:45,116 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:20:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:45,117 INFO L225 Difference]: With dead ends: 110 [2021-05-22 02:20:45,117 INFO L226 Difference]: Without dead ends: 84 [2021-05-22 02:20:45,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 689.3ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:20:45,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-22 02:20:45,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-05-22 02:20:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2021-05-22 02:20:45,120 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 14 [2021-05-22 02:20:45,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:45,120 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2021-05-22 02:20:45,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:45,120 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2021-05-22 02:20:45,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:20:45,120 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:45,120 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:45,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-22 02:20:45,333 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:45,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:45,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1416837628, now seen corresponding path program 6 times [2021-05-22 02:20:45,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:45,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748442343] [2021-05-22 02:20:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:45,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:45,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:45,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748442343] [2021-05-22 02:20:45,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748442343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:45,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851677954] [2021-05-22 02:20:45,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:45,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:20:45,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:45,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:20:45,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:45,812 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-05-22 02:20:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:45,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851677954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:45,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:45,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-22 02:20:45,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245291656] [2021-05-22 02:20:45,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:20:45,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:45,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:20:45,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:20:45,955 INFO L87 Difference]: Start difference. First operand 54 states and 110 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:46,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:46,467 INFO L93 Difference]: Finished difference Result 97 states and 182 transitions. [2021-05-22 02:20:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:20:46,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:20:46,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:46,468 INFO L225 Difference]: With dead ends: 97 [2021-05-22 02:20:46,468 INFO L226 Difference]: Without dead ends: 79 [2021-05-22 02:20:46,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 680.9ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:20:46,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-22 02:20:46,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 56. [2021-05-22 02:20:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.090909090909091) internal successors, (115), 55 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 115 transitions. [2021-05-22 02:20:46,471 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 115 transitions. Word has length 14 [2021-05-22 02:20:46,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:46,471 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 115 transitions. [2021-05-22 02:20:46,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:46,471 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 115 transitions. [2021-05-22 02:20:46,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:20:46,471 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:46,471 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:46,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:46,685 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:46,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1543538338, now seen corresponding path program 7 times [2021-05-22 02:20:46,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:46,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463417271] [2021-05-22 02:20:46,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:46,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:46,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463417271] [2021-05-22 02:20:46,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463417271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:46,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179441905] [2021-05-22 02:20:46,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:46,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:20:46,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:47,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179441905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:47,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:47,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:20:47,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629069436] [2021-05-22 02:20:47,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:20:47,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:47,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:20:47,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:20:47,350 INFO L87 Difference]: Start difference. First operand 56 states and 115 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:47,598 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-05-22 02:20:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:47,767 INFO L93 Difference]: Finished difference Result 115 states and 207 transitions. [2021-05-22 02:20:47,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:20:47,767 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:20:47,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:47,768 INFO L225 Difference]: With dead ends: 115 [2021-05-22 02:20:47,768 INFO L226 Difference]: Without dead ends: 89 [2021-05-22 02:20:47,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 673.0ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:20:47,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-22 02:20:47,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2021-05-22 02:20:47,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 56 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:47,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 117 transitions. [2021-05-22 02:20:47,770 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 117 transitions. Word has length 14 [2021-05-22 02:20:47,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:47,770 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 117 transitions. [2021-05-22 02:20:47,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 117 transitions. [2021-05-22 02:20:47,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:20:47,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:47,771 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:47,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-22 02:20:47,985 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:47,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2081393916, now seen corresponding path program 8 times [2021-05-22 02:20:47,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:47,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985429697] [2021-05-22 02:20:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:48,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:48,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985429697] [2021-05-22 02:20:48,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985429697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:48,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823493414] [2021-05-22 02:20:48,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:48,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:20:48,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:48,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:20:48,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:48,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823493414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:48,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:48,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:20:48,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740575711] [2021-05-22 02:20:48,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:20:48,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:48,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:20:48,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:20:48,521 INFO L87 Difference]: Start difference. First operand 57 states and 117 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:48,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:48,854 INFO L93 Difference]: Finished difference Result 115 states and 215 transitions. [2021-05-22 02:20:48,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:20:48,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:20:48,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:48,855 INFO L225 Difference]: With dead ends: 115 [2021-05-22 02:20:48,855 INFO L226 Difference]: Without dead ends: 89 [2021-05-22 02:20:48,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 435.1ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:20:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-22 02:20:48,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2021-05-22 02:20:48,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 125 transitions. [2021-05-22 02:20:48,857 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 125 transitions. Word has length 14 [2021-05-22 02:20:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:48,857 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 125 transitions. [2021-05-22 02:20:48,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:48,858 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 125 transitions. [2021-05-22 02:20:48,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:20:48,858 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:48,858 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:49,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-22 02:20:49,073 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:49,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:49,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1119481792, now seen corresponding path program 9 times [2021-05-22 02:20:49,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:49,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255431664] [2021-05-22 02:20:49,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:49,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:49,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255431664] [2021-05-22 02:20:49,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255431664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:49,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027288511] [2021-05-22 02:20:49,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:49,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:20:49,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:49,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:20:49,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:49,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027288511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:49,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:49,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-22 02:20:49,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911748751] [2021-05-22 02:20:49,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:20:49,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:49,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:20:49,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:20:49,503 INFO L87 Difference]: Start difference. First operand 60 states and 125 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:50,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:50,382 INFO L93 Difference]: Finished difference Result 142 states and 277 transitions. [2021-05-22 02:20:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:20:50,382 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:20:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:50,383 INFO L225 Difference]: With dead ends: 142 [2021-05-22 02:20:50,383 INFO L226 Difference]: Without dead ends: 123 [2021-05-22 02:20:50,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 999.2ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:20:50,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-22 02:20:50,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2021-05-22 02:20:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.1449275362318843) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:50,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 148 transitions. [2021-05-22 02:20:50,385 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 148 transitions. Word has length 14 [2021-05-22 02:20:50,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:50,386 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 148 transitions. [2021-05-22 02:20:50,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:50,386 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 148 transitions. [2021-05-22 02:20:50,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:50,386 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:50,386 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:50,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:50,593 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:50,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:50,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1559031433, now seen corresponding path program 10 times [2021-05-22 02:20:50,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:50,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767604643] [2021-05-22 02:20:50,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:50,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:50,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767604643] [2021-05-22 02:20:50,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767604643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:50,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012749059] [2021-05-22 02:20:50,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:50,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:20:50,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:50,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:20:50,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:50,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012749059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:50,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:50,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:20:50,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618622592] [2021-05-22 02:20:50,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:20:50,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:50,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:20:50,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:20:50,883 INFO L87 Difference]: Start difference. First operand 70 states and 148 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:50,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:50,940 INFO L93 Difference]: Finished difference Result 102 states and 207 transitions. [2021-05-22 02:20:50,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:20:50,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:20:50,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:50,941 INFO L225 Difference]: With dead ends: 102 [2021-05-22 02:20:50,941 INFO L226 Difference]: Without dead ends: 102 [2021-05-22 02:20:50,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:50,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-22 02:20:50,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2021-05-22 02:20:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.157142857142857) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2021-05-22 02:20:50,943 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2021-05-22 02:20:50,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:50,943 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2021-05-22 02:20:50,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2021-05-22 02:20:50,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:50,944 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:50,944 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:51,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-22 02:20:51,155 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:51,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:51,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1022375235, now seen corresponding path program 11 times [2021-05-22 02:20:51,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:51,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260505048] [2021-05-22 02:20:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:51,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:51,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260505048] [2021-05-22 02:20:51,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260505048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:51,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174387248] [2021-05-22 02:20:51,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:51,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:20:51,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:51,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:20:51,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:51,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174387248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:51,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:51,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:20:51,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668528996] [2021-05-22 02:20:51,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:20:51,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:51,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:20:51,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:20:51,327 INFO L87 Difference]: Start difference. First operand 71 states and 151 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:51,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:51,565 INFO L93 Difference]: Finished difference Result 111 states and 225 transitions. [2021-05-22 02:20:51,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:20:51,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:20:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:51,566 INFO L225 Difference]: With dead ends: 111 [2021-05-22 02:20:51,566 INFO L226 Difference]: Without dead ends: 111 [2021-05-22 02:20:51,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:20:51,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-22 02:20:51,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2021-05-22 02:20:51,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.157142857142857) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:51,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2021-05-22 02:20:51,568 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2021-05-22 02:20:51,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:51,568 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2021-05-22 02:20:51,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2021-05-22 02:20:51,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:51,569 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:51,569 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:51,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:51,781 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:51,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:51,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1144507010, now seen corresponding path program 12 times [2021-05-22 02:20:51,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:51,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697608210] [2021-05-22 02:20:51,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:51,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:51,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697608210] [2021-05-22 02:20:51,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697608210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:51,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060401363] [2021-05-22 02:20:51,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:51,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:20:51,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:51,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:20:51,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:51,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060401363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:51,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:51,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:20:51,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857944589] [2021-05-22 02:20:51,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:20:51,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:51,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:20:51,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:20:51,998 INFO L87 Difference]: Start difference. First operand 71 states and 151 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:52,199 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-05-22 02:20:52,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:52,592 INFO L93 Difference]: Finished difference Result 131 states and 251 transitions. [2021-05-22 02:20:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:20:52,605 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:20:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:52,605 INFO L225 Difference]: With dead ends: 131 [2021-05-22 02:20:52,605 INFO L226 Difference]: Without dead ends: 127 [2021-05-22 02:20:52,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 648.6ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:20:52,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-22 02:20:52,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 79. [2021-05-22 02:20:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 78 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:52,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 169 transitions. [2021-05-22 02:20:52,608 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 169 transitions. Word has length 15 [2021-05-22 02:20:52,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:52,608 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 169 transitions. [2021-05-22 02:20:52,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:52,608 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 169 transitions. [2021-05-22 02:20:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:52,608 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:52,608 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:52,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:52,821 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:52,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:52,821 INFO L82 PathProgramCache]: Analyzing trace with hash -225639483, now seen corresponding path program 13 times [2021-05-22 02:20:52,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:52,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428013964] [2021-05-22 02:20:52,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:52,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:52,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428013964] [2021-05-22 02:20:52,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428013964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:52,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80594725] [2021-05-22 02:20:52,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:53,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:20:53,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:53,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80594725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:53,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:53,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:20:53,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422428863] [2021-05-22 02:20:53,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:20:53,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:53,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:20:53,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:53,127 INFO L87 Difference]: Start difference. First operand 79 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:53,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:53,396 INFO L93 Difference]: Finished difference Result 141 states and 275 transitions. [2021-05-22 02:20:53,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:20:53,402 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:20:53,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:53,403 INFO L225 Difference]: With dead ends: 141 [2021-05-22 02:20:53,403 INFO L226 Difference]: Without dead ends: 141 [2021-05-22 02:20:53,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:20:53,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-22 02:20:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 79. [2021-05-22 02:20:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1666666666666665) internal successors, (169), 78 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 169 transitions. [2021-05-22 02:20:53,406 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 169 transitions. Word has length 15 [2021-05-22 02:20:53,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:53,406 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 169 transitions. [2021-05-22 02:20:53,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:53,407 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 169 transitions. [2021-05-22 02:20:53,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:53,408 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:53,408 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:53,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-05-22 02:20:53,621 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:53,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:53,621 INFO L82 PathProgramCache]: Analyzing trace with hash -432834720, now seen corresponding path program 14 times [2021-05-22 02:20:53,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:53,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447775992] [2021-05-22 02:20:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:53,893 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-22 02:20:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:54,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:54,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447775992] [2021-05-22 02:20:54,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447775992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:54,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901127321] [2021-05-22 02:20:54,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:54,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:20:54,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:54,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:20:54,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:54,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901127321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:54,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:54,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:20:54,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451846269] [2021-05-22 02:20:54,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:20:54,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:54,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:20:54,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:54,250 INFO L87 Difference]: Start difference. First operand 79 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:54,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:54,455 INFO L93 Difference]: Finished difference Result 116 states and 229 transitions. [2021-05-22 02:20:54,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:20:54,456 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:20:54,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:54,457 INFO L225 Difference]: With dead ends: 116 [2021-05-22 02:20:54,457 INFO L226 Difference]: Without dead ends: 114 [2021-05-22 02:20:54,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 622.2ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:20:54,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-22 02:20:54,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2021-05-22 02:20:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.1621621621621623) internal successors, (160), 74 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 160 transitions. [2021-05-22 02:20:54,459 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 160 transitions. Word has length 15 [2021-05-22 02:20:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:54,459 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 160 transitions. [2021-05-22 02:20:54,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 160 transitions. [2021-05-22 02:20:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:54,459 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:54,459 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:54,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:54,660 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:54,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:54,660 INFO L82 PathProgramCache]: Analyzing trace with hash 250671963, now seen corresponding path program 15 times [2021-05-22 02:20:54,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:54,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315943237] [2021-05-22 02:20:54,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:54,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:54,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315943237] [2021-05-22 02:20:54,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315943237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:54,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085500964] [2021-05-22 02:20:54,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:54,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:20:54,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:54,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:20:54,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:54,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085500964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:54,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:54,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:20:54,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474356612] [2021-05-22 02:20:54,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:20:54,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:54,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:20:54,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:54,933 INFO L87 Difference]: Start difference. First operand 75 states and 160 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:55,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:55,090 INFO L93 Difference]: Finished difference Result 107 states and 215 transitions. [2021-05-22 02:20:55,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:20:55,091 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:20:55,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:55,099 INFO L225 Difference]: With dead ends: 107 [2021-05-22 02:20:55,099 INFO L226 Difference]: Without dead ends: 104 [2021-05-22 02:20:55,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:20:55,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-22 02:20:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2021-05-22 02:20:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.1486486486486487) internal successors, (159), 74 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 159 transitions. [2021-05-22 02:20:55,102 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 159 transitions. Word has length 15 [2021-05-22 02:20:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:55,102 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 159 transitions. [2021-05-22 02:20:55,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:55,102 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 159 transitions. [2021-05-22 02:20:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:55,102 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:55,102 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:55,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:55,321 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:55,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:55,322 INFO L82 PathProgramCache]: Analyzing trace with hash 901756610, now seen corresponding path program 16 times [2021-05-22 02:20:55,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:55,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253943339] [2021-05-22 02:20:55,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:55,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:55,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253943339] [2021-05-22 02:20:55,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253943339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:55,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934895296] [2021-05-22 02:20:55,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:55,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:20:55,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:55,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:20:55,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:55,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:55,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934895296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:55,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:55,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:20:55,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733753149] [2021-05-22 02:20:55,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:20:55,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:55,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:20:55,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:55,660 INFO L87 Difference]: Start difference. First operand 75 states and 159 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:55,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:55,803 INFO L93 Difference]: Finished difference Result 100 states and 204 transitions. [2021-05-22 02:20:55,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:20:55,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:20:55,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:55,805 INFO L225 Difference]: With dead ends: 100 [2021-05-22 02:20:55,805 INFO L226 Difference]: Without dead ends: 100 [2021-05-22 02:20:55,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:20:55,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-22 02:20:55,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 72. [2021-05-22 02:20:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.140845070422535) internal successors, (152), 71 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2021-05-22 02:20:55,815 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2021-05-22 02:20:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:55,815 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2021-05-22 02:20:55,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2021-05-22 02:20:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:55,816 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:55,816 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:56,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:56,033 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:56,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:56,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2062611033, now seen corresponding path program 17 times [2021-05-22 02:20:56,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:56,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695445844] [2021-05-22 02:20:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:56,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:56,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695445844] [2021-05-22 02:20:56,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695445844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:56,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635885624] [2021-05-22 02:20:56,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:56,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:20:56,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:56,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:20:56,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:56,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635885624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:56,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:56,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-22 02:20:56,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195970271] [2021-05-22 02:20:56,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-22 02:20:56,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:56,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-22 02:20:56,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:20:56,268 INFO L87 Difference]: Start difference. First operand 72 states and 152 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:56,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:56,364 INFO L93 Difference]: Finished difference Result 82 states and 172 transitions. [2021-05-22 02:20:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:20:56,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:20:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:56,364 INFO L225 Difference]: With dead ends: 82 [2021-05-22 02:20:56,365 INFO L226 Difference]: Without dead ends: 82 [2021-05-22 02:20:56,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:20:56,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-22 02:20:56,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-05-22 02:20:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.140845070422535) internal successors, (152), 71 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2021-05-22 02:20:56,366 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2021-05-22 02:20:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:56,366 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2021-05-22 02:20:56,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2021-05-22 02:20:56,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:56,375 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:56,375 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:56,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:56,589 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:56,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:56,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1265875281, now seen corresponding path program 18 times [2021-05-22 02:20:56,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:56,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798932923] [2021-05-22 02:20:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:56,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:56,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798932923] [2021-05-22 02:20:56,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798932923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:56,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146398695] [2021-05-22 02:20:56,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:56,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:20:56,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:56,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:20:56,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:56,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146398695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:56,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:56,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:20:56,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535344095] [2021-05-22 02:20:56,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:20:56,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:56,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:20:56,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:56,845 INFO L87 Difference]: Start difference. First operand 72 states and 152 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:56,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:56,895 INFO L93 Difference]: Finished difference Result 88 states and 184 transitions. [2021-05-22 02:20:56,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:20:56,896 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:20:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:56,897 INFO L225 Difference]: With dead ends: 88 [2021-05-22 02:20:56,897 INFO L226 Difference]: Without dead ends: 88 [2021-05-22 02:20:56,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-22 02:20:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2021-05-22 02:20:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.140845070422535) internal successors, (152), 71 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2021-05-22 02:20:56,902 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 15 [2021-05-22 02:20:56,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:56,902 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2021-05-22 02:20:56,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2021-05-22 02:20:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:56,903 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:56,903 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:57,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:57,114 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:57,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:57,114 INFO L82 PathProgramCache]: Analyzing trace with hash -978325046, now seen corresponding path program 19 times [2021-05-22 02:20:57,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:57,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404005141] [2021-05-22 02:20:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:57,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:57,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404005141] [2021-05-22 02:20:57,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404005141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:57,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362165430] [2021-05-22 02:20:57,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:57,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:20:57,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:57,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362165430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:57,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:57,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:20:57,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073584829] [2021-05-22 02:20:57,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:20:57,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:57,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:20:57,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:57,430 INFO L87 Difference]: Start difference. First operand 72 states and 152 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:57,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:57,467 INFO L93 Difference]: Finished difference Result 79 states and 164 transitions. [2021-05-22 02:20:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:20:57,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:20:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:57,470 INFO L225 Difference]: With dead ends: 79 [2021-05-22 02:20:57,470 INFO L226 Difference]: Without dead ends: 79 [2021-05-22 02:20:57,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-22 02:20:57,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-05-22 02:20:57,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 68 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:57,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 144 transitions. [2021-05-22 02:20:57,473 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 144 transitions. Word has length 15 [2021-05-22 02:20:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:57,473 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 144 transitions. [2021-05-22 02:20:57,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:57,473 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 144 transitions. [2021-05-22 02:20:57,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:57,473 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:57,473 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:57,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:57,685 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:57,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:57,685 INFO L82 PathProgramCache]: Analyzing trace with hash 367867078, now seen corresponding path program 20 times [2021-05-22 02:20:57,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:57,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356158546] [2021-05-22 02:20:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:57,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:57,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356158546] [2021-05-22 02:20:57,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356158546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:57,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147079435] [2021-05-22 02:20:57,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:57,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:20:57,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:57,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:20:57,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:57,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147079435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:57,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:57,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:20:57,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753215056] [2021-05-22 02:20:57,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:20:57,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:57,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:20:57,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:57,961 INFO L87 Difference]: Start difference. First operand 69 states and 144 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:58,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:58,099 INFO L93 Difference]: Finished difference Result 124 states and 235 transitions. [2021-05-22 02:20:58,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:20:58,099 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:20:58,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:58,100 INFO L225 Difference]: With dead ends: 124 [2021-05-22 02:20:58,100 INFO L226 Difference]: Without dead ends: 124 [2021-05-22 02:20:58,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 246.8ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:20:58,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-22 02:20:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 71. [2021-05-22 02:20:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.157142857142857) internal successors, (151), 70 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 151 transitions. [2021-05-22 02:20:58,102 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 151 transitions. Word has length 15 [2021-05-22 02:20:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:58,102 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 151 transitions. [2021-05-22 02:20:58,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 151 transitions. [2021-05-22 02:20:58,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:58,102 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:58,102 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:58,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-22 02:20:58,311 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:58,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:58,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1862953191, now seen corresponding path program 21 times [2021-05-22 02:20:58,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:58,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291643960] [2021-05-22 02:20:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:58,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:58,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291643960] [2021-05-22 02:20:58,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291643960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:58,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643170057] [2021-05-22 02:20:58,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:58,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:20:58,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:58,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:20:58,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:58,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643170057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:58,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:58,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:20:58,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382842142] [2021-05-22 02:20:58,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:20:58,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:58,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:20:58,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:58,542 INFO L87 Difference]: Start difference. First operand 71 states and 151 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:58,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:58,641 INFO L93 Difference]: Finished difference Result 114 states and 220 transitions. [2021-05-22 02:20:58,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:20:58,641 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:20:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:58,642 INFO L225 Difference]: With dead ends: 114 [2021-05-22 02:20:58,642 INFO L226 Difference]: Without dead ends: 108 [2021-05-22 02:20:58,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:20:58,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-22 02:20:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2021-05-22 02:20:58,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1728395061728394) internal successors, (176), 81 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 176 transitions. [2021-05-22 02:20:58,647 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 176 transitions. Word has length 15 [2021-05-22 02:20:58,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:58,647 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 176 transitions. [2021-05-22 02:20:58,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:58,647 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 176 transitions. [2021-05-22 02:20:58,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:58,647 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:58,647 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:58,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-22 02:20:58,863 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:58,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:58,863 INFO L82 PathProgramCache]: Analyzing trace with hash -169988500, now seen corresponding path program 22 times [2021-05-22 02:20:58,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:58,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339831827] [2021-05-22 02:20:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:58,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:58,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339831827] [2021-05-22 02:20:58,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339831827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:58,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485786970] [2021-05-22 02:20:58,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:58,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:20:58,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:58,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:20:58,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:58,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485786970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:58,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:58,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:20:58,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748435227] [2021-05-22 02:20:58,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:20:58,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:58,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:20:58,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:58,988 INFO L87 Difference]: Start difference. First operand 82 states and 176 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:59,029 INFO L93 Difference]: Finished difference Result 96 states and 201 transitions. [2021-05-22 02:20:59,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:20:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:20:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:59,029 INFO L225 Difference]: With dead ends: 96 [2021-05-22 02:20:59,029 INFO L226 Difference]: Without dead ends: 96 [2021-05-22 02:20:59,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-22 02:20:59,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2021-05-22 02:20:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.15) internal successors, (172), 80 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 172 transitions. [2021-05-22 02:20:59,033 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 172 transitions. Word has length 15 [2021-05-22 02:20:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:59,033 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 172 transitions. [2021-05-22 02:20:59,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 172 transitions. [2021-05-22 02:20:59,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:59,034 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:59,034 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:59,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:59,251 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:59,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:59,252 INFO L82 PathProgramCache]: Analyzing trace with hash 961923201, now seen corresponding path program 23 times [2021-05-22 02:20:59,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:59,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144903552] [2021-05-22 02:20:59,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:59,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:59,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144903552] [2021-05-22 02:20:59,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144903552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:59,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872967400] [2021-05-22 02:20:59,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:59,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:20:59,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:59,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:20:59,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:59,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872967400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:59,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:59,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:20:59,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262635994] [2021-05-22 02:20:59,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:20:59,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:59,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:20:59,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:59,390 INFO L87 Difference]: Start difference. First operand 81 states and 172 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:59,425 INFO L93 Difference]: Finished difference Result 91 states and 190 transitions. [2021-05-22 02:20:59,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:20:59,425 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:20:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:59,426 INFO L225 Difference]: With dead ends: 91 [2021-05-22 02:20:59,426 INFO L226 Difference]: Without dead ends: 91 [2021-05-22 02:20:59,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:59,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-22 02:20:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2021-05-22 02:20:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:59,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-05-22 02:20:59,428 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-05-22 02:20:59,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:59,428 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-05-22 02:20:59,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:59,428 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-05-22 02:20:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:59,428 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:59,428 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:20:59,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-22 02:20:59,645 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:20:59,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:20:59,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1551463716, now seen corresponding path program 24 times [2021-05-22 02:20:59,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:20:59,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740385552] [2021-05-22 02:20:59,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:20:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:20:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:59,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:20:59,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740385552] [2021-05-22 02:20:59,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740385552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:59,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254450735] [2021-05-22 02:20:59,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:20:59,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:20:59,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:20:59,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:20:59,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:20:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:20:59,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254450735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:20:59,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:20:59,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:20:59,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771225422] [2021-05-22 02:20:59,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:20:59,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:20:59,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:20:59,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:59,820 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:20:59,847 INFO L93 Difference]: Finished difference Result 84 states and 177 transitions. [2021-05-22 02:20:59,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:20:59,847 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:20:59,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:20:59,848 INFO L225 Difference]: With dead ends: 84 [2021-05-22 02:20:59,848 INFO L226 Difference]: Without dead ends: 84 [2021-05-22 02:20:59,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:20:59,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-22 02:20:59,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2021-05-22 02:20:59,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-05-22 02:20:59,849 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-05-22 02:20:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:20:59,849 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-05-22 02:20:59,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:20:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-05-22 02:20:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:20:59,850 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:20:59,850 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:00,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:00,065 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:00,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:00,065 INFO L82 PathProgramCache]: Analyzing trace with hash 930413889, now seen corresponding path program 25 times [2021-05-22 02:21:00,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:00,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078226331] [2021-05-22 02:21:00,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:00,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:00,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078226331] [2021-05-22 02:21:00,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078226331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:00,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772334073] [2021-05-22 02:21:00,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:00,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:21:00,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:00,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772334073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:00,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:00,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:21:00,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237821361] [2021-05-22 02:21:00,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:21:00,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:00,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:21:00,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:21:00,253 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:00,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:00,351 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-05-22 02:21:00,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:21:00,351 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:21:00,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:00,351 INFO L225 Difference]: With dead ends: 101 [2021-05-22 02:21:00,351 INFO L226 Difference]: Without dead ends: 101 [2021-05-22 02:21:00,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:21:00,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-22 02:21:00,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 80. [2021-05-22 02:21:00,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:00,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-05-22 02:21:00,354 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-05-22 02:21:00,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:00,354 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-05-22 02:21:00,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:00,354 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-05-22 02:21:00,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:21:00,354 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:00,354 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:00,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-22 02:21:00,557 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:00,557 INFO L82 PathProgramCache]: Analyzing trace with hash -742071201, now seen corresponding path program 26 times [2021-05-22 02:21:00,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:00,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361867268] [2021-05-22 02:21:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:00,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:00,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361867268] [2021-05-22 02:21:00,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361867268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:00,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779338753] [2021-05-22 02:21:00,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:00,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:21:00,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:00,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:21:00,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:00,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779338753] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:00,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:00,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:21:00,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268145064] [2021-05-22 02:21:00,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:21:00,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:00,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:21:00,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:21:00,750 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:00,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:00,834 INFO L93 Difference]: Finished difference Result 89 states and 182 transitions. [2021-05-22 02:21:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:21:00,834 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:21:00,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:00,835 INFO L225 Difference]: With dead ends: 89 [2021-05-22 02:21:00,835 INFO L226 Difference]: Without dead ends: 83 [2021-05-22 02:21:00,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:21:00,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-22 02:21:00,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-05-22 02:21:00,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-05-22 02:21:00,840 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-05-22 02:21:00,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:00,840 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-05-22 02:21:00,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-05-22 02:21:00,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:21:00,840 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:00,840 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:01,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-22 02:21:01,045 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:01,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:01,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1373313029, now seen corresponding path program 27 times [2021-05-22 02:21:01,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:01,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826610439] [2021-05-22 02:21:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:01,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:01,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826610439] [2021-05-22 02:21:01,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826610439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:01,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136892497] [2021-05-22 02:21:01,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:01,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:21:01,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:01,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:21:01,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:01,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136892497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:01,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:01,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:21:01,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26729749] [2021-05-22 02:21:01,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:21:01,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:01,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:21:01,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:21:01,244 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:01,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:01,521 INFO L93 Difference]: Finished difference Result 122 states and 241 transitions. [2021-05-22 02:21:01,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:21:01,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:21:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:01,523 INFO L225 Difference]: With dead ends: 122 [2021-05-22 02:21:01,523 INFO L226 Difference]: Without dead ends: 122 [2021-05-22 02:21:01,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 318.2ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:21:01,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-22 02:21:01,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 80. [2021-05-22 02:21:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:01,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-05-22 02:21:01,526 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-05-22 02:21:01,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:01,527 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-05-22 02:21:01,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:01,527 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-05-22 02:21:01,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:21:01,529 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:01,530 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:01,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:01,737 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:01,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1660863264, now seen corresponding path program 28 times [2021-05-22 02:21:01,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:01,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550278061] [2021-05-22 02:21:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:01,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:01,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550278061] [2021-05-22 02:21:01,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550278061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:01,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345427269] [2021-05-22 02:21:01,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-22 02:21:01,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:21:01,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:01,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:21:01,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:01,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345427269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:01,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:01,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:21:01,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659830126] [2021-05-22 02:21:01,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:21:01,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:01,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:21:01,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:21:01,877 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:02,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:02,089 INFO L93 Difference]: Finished difference Result 152 states and 289 transitions. [2021-05-22 02:21:02,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:21:02,089 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:21:02,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:02,090 INFO L225 Difference]: With dead ends: 152 [2021-05-22 02:21:02,090 INFO L226 Difference]: Without dead ends: 152 [2021-05-22 02:21:02,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:02,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-22 02:21:02,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 80. [2021-05-22 02:21:02,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:02,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-05-22 02:21:02,092 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 15 [2021-05-22 02:21:02,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:02,092 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-05-22 02:21:02,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:02,092 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-05-22 02:21:02,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:21:02,092 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:02,092 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:02,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-22 02:21:02,293 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:02,293 INFO L82 PathProgramCache]: Analyzing trace with hash -299172061, now seen corresponding path program 29 times [2021-05-22 02:21:02,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:02,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349208900] [2021-05-22 02:21:02,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:02,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:02,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349208900] [2021-05-22 02:21:02,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349208900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:02,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37425176] [2021-05-22 02:21:02,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:02,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:21:02,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:02,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:21:02,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:02,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37425176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:02,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:02,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:21:02,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943941759] [2021-05-22 02:21:02,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:21:02,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:02,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:21:02,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:21:02,481 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:02,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:02,744 INFO L93 Difference]: Finished difference Result 129 states and 251 transitions. [2021-05-22 02:21:02,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:21:02,744 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:21:02,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:02,745 INFO L225 Difference]: With dead ends: 129 [2021-05-22 02:21:02,745 INFO L226 Difference]: Without dead ends: 123 [2021-05-22 02:21:02,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 317.2ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:21:02,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-22 02:21:02,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 80. [2021-05-22 02:21:02,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:02,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-05-22 02:21:02,746 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-05-22 02:21:02,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:02,747 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-05-22 02:21:02,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:02,747 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-05-22 02:21:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:21:02,747 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:02,747 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:02,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-05-22 02:21:02,947 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:02,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1962853544, now seen corresponding path program 30 times [2021-05-22 02:21:02,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:02,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785828377] [2021-05-22 02:21:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:03,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:03,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:03,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785828377] [2021-05-22 02:21:03,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785828377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:03,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119974216] [2021-05-22 02:21:03,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:03,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:21:03,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:03,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:21:03,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:03,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:03,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119974216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:03,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:03,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:21:03,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945119051] [2021-05-22 02:21:03,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:21:03,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:03,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:21:03,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:21:03,108 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:03,201 INFO L93 Difference]: Finished difference Result 123 states and 249 transitions. [2021-05-22 02:21:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:21:03,202 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:21:03,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:03,202 INFO L225 Difference]: With dead ends: 123 [2021-05-22 02:21:03,202 INFO L226 Difference]: Without dead ends: 123 [2021-05-22 02:21:03,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:21:03,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-22 02:21:03,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 80. [2021-05-22 02:21:03,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:03,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2021-05-22 02:21:03,204 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 15 [2021-05-22 02:21:03,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:03,204 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2021-05-22 02:21:03,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:03,204 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2021-05-22 02:21:03,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:21:03,204 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:03,204 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:03,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:03,417 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:03,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:03,417 INFO L82 PathProgramCache]: Analyzing trace with hash 207174205, now seen corresponding path program 31 times [2021-05-22 02:21:03,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:03,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137306228] [2021-05-22 02:21:03,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:03,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:03,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137306228] [2021-05-22 02:21:03,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137306228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:03,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019699075] [2021-05-22 02:21:03,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:03,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:21:03,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:03,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019699075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:03,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:03,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:21:03,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161024520] [2021-05-22 02:21:03,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:21:03,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:03,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:21:03,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:21:03,604 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:03,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:03,698 INFO L93 Difference]: Finished difference Result 107 states and 214 transitions. [2021-05-22 02:21:03,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:21:03,698 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:21:03,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:03,698 INFO L225 Difference]: With dead ends: 107 [2021-05-22 02:21:03,698 INFO L226 Difference]: Without dead ends: 96 [2021-05-22 02:21:03,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-22 02:21:03,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-22 02:21:03,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 75. [2021-05-22 02:21:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.135135135135135) internal successors, (158), 74 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:03,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 158 transitions. [2021-05-22 02:21:03,700 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 158 transitions. Word has length 15 [2021-05-22 02:21:03,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:03,700 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 158 transitions. [2021-05-22 02:21:03,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 158 transitions. [2021-05-22 02:21:03,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:21:03,701 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:03,701 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:03,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-22 02:21:03,905 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:03,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:03,905 INFO L82 PathProgramCache]: Analyzing trace with hash 868761956, now seen corresponding path program 32 times [2021-05-22 02:21:03,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:03,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426048482] [2021-05-22 02:21:03,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:03,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:03,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426048482] [2021-05-22 02:21:03,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426048482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:03,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814551554] [2021-05-22 02:21:03,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:03,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:21:03,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:03,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:21:03,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:04,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814551554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:04,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:04,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-22 02:21:04,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698753112] [2021-05-22 02:21:04,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:21:04,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:04,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:21:04,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:21:04,013 INFO L87 Difference]: Start difference. First operand 75 states and 158 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:04,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:04,066 INFO L93 Difference]: Finished difference Result 110 states and 222 transitions. [2021-05-22 02:21:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:21:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:21:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:04,066 INFO L225 Difference]: With dead ends: 110 [2021-05-22 02:21:04,066 INFO L226 Difference]: Without dead ends: 110 [2021-05-22 02:21:04,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:21:04,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-22 02:21:04,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2021-05-22 02:21:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 151 transitions. [2021-05-22 02:21:04,068 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 151 transitions. Word has length 15 [2021-05-22 02:21:04,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:04,068 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 151 transitions. [2021-05-22 02:21:04,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:04,068 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 151 transitions. [2021-05-22 02:21:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:04,069 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:04,069 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:04,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-05-22 02:21:04,273 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:04,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:04,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1907254775, now seen corresponding path program 33 times [2021-05-22 02:21:04,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:04,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815499232] [2021-05-22 02:21:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:04,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:04,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815499232] [2021-05-22 02:21:04,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815499232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:04,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913989419] [2021-05-22 02:21:04,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:04,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:21:04,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:04,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:04,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:04,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913989419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:04,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:04,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:04,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811049697] [2021-05-22 02:21:04,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:04,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:04,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:04,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:04,742 INFO L87 Difference]: Start difference. First operand 73 states and 151 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:05,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:05,035 INFO L93 Difference]: Finished difference Result 138 states and 265 transitions. [2021-05-22 02:21:05,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:21:05,036 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:05,036 INFO L225 Difference]: With dead ends: 138 [2021-05-22 02:21:05,036 INFO L226 Difference]: Without dead ends: 123 [2021-05-22 02:21:05,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:21:05,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-22 02:21:05,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2021-05-22 02:21:05,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.095890410958904) internal successors, (153), 73 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:05,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 153 transitions. [2021-05-22 02:21:05,038 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 153 transitions. Word has length 16 [2021-05-22 02:21:05,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:05,038 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 153 transitions. [2021-05-22 02:21:05,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:05,038 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 153 transitions. [2021-05-22 02:21:05,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:05,038 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:05,039 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:05,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:05,245 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:05,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:05,246 INFO L82 PathProgramCache]: Analyzing trace with hash 233295193, now seen corresponding path program 34 times [2021-05-22 02:21:05,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:05,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442389767] [2021-05-22 02:21:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:05,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:05,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442389767] [2021-05-22 02:21:05,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442389767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:05,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367997474] [2021-05-22 02:21:05,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:05,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:21:05,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:05,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:05,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:05,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367997474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:05,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:05,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-22 02:21:05,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809161386] [2021-05-22 02:21:05,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:21:05,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:05,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:21:05,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:21:05,674 INFO L87 Difference]: Start difference. First operand 74 states and 153 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:06,265 INFO L93 Difference]: Finished difference Result 138 states and 266 transitions. [2021-05-22 02:21:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:21:06,265 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:06,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:06,266 INFO L225 Difference]: With dead ends: 138 [2021-05-22 02:21:06,266 INFO L226 Difference]: Without dead ends: 125 [2021-05-22 02:21:06,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 716.2ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:21:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-22 02:21:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2021-05-22 02:21:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-05-22 02:21:06,268 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 16 [2021-05-22 02:21:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:06,268 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-05-22 02:21:06,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:06,268 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-05-22 02:21:06,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:06,268 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:06,268 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:06,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-22 02:21:06,477 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:06,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:06,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1344046537, now seen corresponding path program 35 times [2021-05-22 02:21:06,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:06,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433743720] [2021-05-22 02:21:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:06,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:06,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433743720] [2021-05-22 02:21:06,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433743720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:06,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075539721] [2021-05-22 02:21:06,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:06,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:21:06,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:06,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:06,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:06,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075539721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:06,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:06,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:06,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456756106] [2021-05-22 02:21:06,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:06,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:06,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:06,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:06,975 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:07,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:07,941 INFO L93 Difference]: Finished difference Result 163 states and 313 transitions. [2021-05-22 02:21:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:21:07,941 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:07,942 INFO L225 Difference]: With dead ends: 163 [2021-05-22 02:21:07,942 INFO L226 Difference]: Without dead ends: 145 [2021-05-22 02:21:07,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1079.8ms TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:21:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-22 02:21:07,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 75. [2021-05-22 02:21:07,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-05-22 02:21:07,944 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 16 [2021-05-22 02:21:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:07,944 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-05-22 02:21:07,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:07,944 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-05-22 02:21:07,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:07,944 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:07,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:08,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:08,160 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:08,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:08,160 INFO L82 PathProgramCache]: Analyzing trace with hash -806940605, now seen corresponding path program 36 times [2021-05-22 02:21:08,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:08,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509064479] [2021-05-22 02:21:08,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:08,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:08,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509064479] [2021-05-22 02:21:08,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509064479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:08,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367367586] [2021-05-22 02:21:08,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:08,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:21:08,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:08,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:08,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:08,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367367586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:08,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:08,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-22 02:21:08,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520249750] [2021-05-22 02:21:08,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:21:08,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:08,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:21:08,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:21:08,669 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:09,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:09,102 INFO L93 Difference]: Finished difference Result 116 states and 226 transitions. [2021-05-22 02:21:09,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:21:09,102 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:09,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:09,102 INFO L225 Difference]: With dead ends: 116 [2021-05-22 02:21:09,102 INFO L226 Difference]: Without dead ends: 103 [2021-05-22 02:21:09,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 675.5ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:21:09,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-22 02:21:09,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 77. [2021-05-22 02:21:09,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0921052631578947) internal successors, (159), 76 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:09,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 159 transitions. [2021-05-22 02:21:09,104 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 159 transitions. Word has length 16 [2021-05-22 02:21:09,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:09,104 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 159 transitions. [2021-05-22 02:21:09,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:09,104 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 159 transitions. [2021-05-22 02:21:09,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:09,104 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:09,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:09,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-05-22 02:21:09,313 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:09,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:09,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1910684961, now seen corresponding path program 37 times [2021-05-22 02:21:09,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:09,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929885320] [2021-05-22 02:21:09,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:09,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:09,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929885320] [2021-05-22 02:21:09,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929885320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:09,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974514073] [2021-05-22 02:21:09,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:09,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:09,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:09,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974514073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:09,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:09,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:09,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123397892] [2021-05-22 02:21:09,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:09,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:09,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:09,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:09,802 INFO L87 Difference]: Start difference. First operand 77 states and 159 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:10,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:10,395 INFO L93 Difference]: Finished difference Result 128 states and 249 transitions. [2021-05-22 02:21:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:21:10,396 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:10,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:10,396 INFO L225 Difference]: With dead ends: 128 [2021-05-22 02:21:10,396 INFO L226 Difference]: Without dead ends: 121 [2021-05-22 02:21:10,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 743.2ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:21:10,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-22 02:21:10,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 78. [2021-05-22 02:21:10,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-05-22 02:21:10,398 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-05-22 02:21:10,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:10,398 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-05-22 02:21:10,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:10,398 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-05-22 02:21:10,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:10,398 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:10,398 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:10,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-05-22 02:21:10,607 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:10,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1049691005, now seen corresponding path program 38 times [2021-05-22 02:21:10,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:10,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986592802] [2021-05-22 02:21:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:10,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:10,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986592802] [2021-05-22 02:21:10,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986592802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:10,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043464641] [2021-05-22 02:21:10,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:10,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:21:10,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:10,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:10,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:11,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043464641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:11,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:11,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:11,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448355197] [2021-05-22 02:21:11,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:11,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:11,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:11,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:11,087 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:11,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:11,611 INFO L93 Difference]: Finished difference Result 141 states and 268 transitions. [2021-05-22 02:21:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:21:11,611 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:11,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:11,611 INFO L225 Difference]: With dead ends: 141 [2021-05-22 02:21:11,611 INFO L226 Difference]: Without dead ends: 111 [2021-05-22 02:21:11,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 687.3ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:21:11,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-22 02:21:11,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 79. [2021-05-22 02:21:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.08974358974359) internal successors, (163), 78 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 163 transitions. [2021-05-22 02:21:11,613 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 163 transitions. Word has length 16 [2021-05-22 02:21:11,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:11,613 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 163 transitions. [2021-05-22 02:21:11,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:11,613 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 163 transitions. [2021-05-22 02:21:11,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:11,614 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:11,614 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:11,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:11,825 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:11,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:11,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1877936069, now seen corresponding path program 39 times [2021-05-22 02:21:11,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:11,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092627426] [2021-05-22 02:21:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:12,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:12,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092627426] [2021-05-22 02:21:12,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092627426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:12,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645536550] [2021-05-22 02:21:12,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:12,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:21:12,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:12,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:12,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:12,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645536550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:12,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:12,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:12,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70713131] [2021-05-22 02:21:12,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:12,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:12,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:12,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:12,357 INFO L87 Difference]: Start difference. First operand 79 states and 163 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:12,938 INFO L93 Difference]: Finished difference Result 145 states and 279 transitions. [2021-05-22 02:21:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:21:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:12,939 INFO L225 Difference]: With dead ends: 145 [2021-05-22 02:21:12,939 INFO L226 Difference]: Without dead ends: 127 [2021-05-22 02:21:12,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 807.2ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:21:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-22 02:21:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2021-05-22 02:21:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1204819277108435) internal successors, (176), 83 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 176 transitions. [2021-05-22 02:21:12,941 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 176 transitions. Word has length 16 [2021-05-22 02:21:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:12,941 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 176 transitions. [2021-05-22 02:21:12,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 176 transitions. [2021-05-22 02:21:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:12,941 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:12,941 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:13,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-05-22 02:21:13,157 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:13,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:13,157 INFO L82 PathProgramCache]: Analyzing trace with hash -543344739, now seen corresponding path program 40 times [2021-05-22 02:21:13,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:13,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593828545] [2021-05-22 02:21:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:13,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:13,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593828545] [2021-05-22 02:21:13,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593828545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:13,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115731174] [2021-05-22 02:21:13,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:13,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:21:13,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:13,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:13,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:13,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115731174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:13,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:13,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:13,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455949321] [2021-05-22 02:21:13,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:13,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:13,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:13,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:13,618 INFO L87 Difference]: Start difference. First operand 84 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:14,316 INFO L93 Difference]: Finished difference Result 173 states and 327 transitions. [2021-05-22 02:21:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:21:14,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:14,317 INFO L225 Difference]: With dead ends: 173 [2021-05-22 02:21:14,317 INFO L226 Difference]: Without dead ends: 154 [2021-05-22 02:21:14,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 831.7ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:21:14,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-22 02:21:14,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 84. [2021-05-22 02:21:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1325301204819276) internal successors, (177), 83 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 177 transitions. [2021-05-22 02:21:14,319 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 177 transitions. Word has length 16 [2021-05-22 02:21:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:14,319 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 177 transitions. [2021-05-22 02:21:14,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 177 transitions. [2021-05-22 02:21:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:14,319 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:14,319 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:14,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:14,525 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:14,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:14,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1081200317, now seen corresponding path program 41 times [2021-05-22 02:21:14,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:14,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835512691] [2021-05-22 02:21:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:14,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:14,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835512691] [2021-05-22 02:21:14,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835512691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:14,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378441741] [2021-05-22 02:21:14,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:14,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:21:14,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:14,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:14,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:14,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378441741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:14,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:14,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:14,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231501079] [2021-05-22 02:21:14,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:14,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:14,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:14,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:14,981 INFO L87 Difference]: Start difference. First operand 84 states and 177 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:15,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:15,528 INFO L93 Difference]: Finished difference Result 179 states and 342 transitions. [2021-05-22 02:21:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:21:15,529 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:15,529 INFO L225 Difference]: With dead ends: 179 [2021-05-22 02:21:15,529 INFO L226 Difference]: Without dead ends: 160 [2021-05-22 02:21:15,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 701.6ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:21:15,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-22 02:21:15,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 86. [2021-05-22 02:21:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-05-22 02:21:15,531 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 16 [2021-05-22 02:21:15,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:15,532 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-05-22 02:21:15,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-05-22 02:21:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:15,532 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:15,532 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:15,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-05-22 02:21:15,749 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:15,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1305488025, now seen corresponding path program 42 times [2021-05-22 02:21:15,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:15,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627889362] [2021-05-22 02:21:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:15,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:15,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627889362] [2021-05-22 02:21:15,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627889362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:15,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601204504] [2021-05-22 02:21:15,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:15,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-22 02:21:15,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:15,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:15,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:16,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601204504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:16,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:16,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-22 02:21:16,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902440224] [2021-05-22 02:21:16,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:21:16,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:16,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:21:16,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:21:16,211 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:16,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:16,563 INFO L93 Difference]: Finished difference Result 107 states and 215 transitions. [2021-05-22 02:21:16,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:21:16,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:16,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:16,563 INFO L225 Difference]: With dead ends: 107 [2021-05-22 02:21:16,563 INFO L226 Difference]: Without dead ends: 94 [2021-05-22 02:21:16,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 587.8ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:21:16,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-22 02:21:16,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2021-05-22 02:21:16,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.13953488372093) internal successors, (184), 86 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 184 transitions. [2021-05-22 02:21:16,565 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 184 transitions. Word has length 16 [2021-05-22 02:21:16,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:16,565 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 184 transitions. [2021-05-22 02:21:16,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 184 transitions. [2021-05-22 02:21:16,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:16,566 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:16,566 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:16,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:16,766 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:16,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:16,767 INFO L82 PathProgramCache]: Analyzing trace with hash -271853705, now seen corresponding path program 43 times [2021-05-22 02:21:16,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:16,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004235399] [2021-05-22 02:21:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:16,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:16,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004235399] [2021-05-22 02:21:16,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004235399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:16,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232820856] [2021-05-22 02:21:16,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:16,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:16,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:17,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232820856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:17,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:17,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:17,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053272419] [2021-05-22 02:21:17,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:17,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:17,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:17,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:17,196 INFO L87 Difference]: Start difference. First operand 87 states and 184 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:17,776 INFO L93 Difference]: Finished difference Result 119 states and 238 transitions. [2021-05-22 02:21:17,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:21:17,776 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:17,777 INFO L225 Difference]: With dead ends: 119 [2021-05-22 02:21:17,777 INFO L226 Difference]: Without dead ends: 112 [2021-05-22 02:21:17,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 723.2ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:21:17,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-22 02:21:17,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 88. [2021-05-22 02:21:17,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 87 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:17,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 187 transitions. [2021-05-22 02:21:17,779 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 187 transitions. Word has length 16 [2021-05-22 02:21:17,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:17,779 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 187 transitions. [2021-05-22 02:21:17,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:17,779 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 187 transitions. [2021-05-22 02:21:17,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:17,779 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:17,779 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:17,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:17,994 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:17,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:17,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1062737625, now seen corresponding path program 44 times [2021-05-22 02:21:17,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:17,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223705769] [2021-05-22 02:21:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:18,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:18,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223705769] [2021-05-22 02:21:18,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223705769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:18,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753364225] [2021-05-22 02:21:18,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:18,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:21:18,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:18,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:18,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:18,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753364225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:18,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:18,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:18,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005449027] [2021-05-22 02:21:18,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:18,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:18,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:18,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:18,490 INFO L87 Difference]: Start difference. First operand 88 states and 187 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:18,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:18,998 INFO L93 Difference]: Finished difference Result 144 states and 276 transitions. [2021-05-22 02:21:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:21:18,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:18,998 INFO L225 Difference]: With dead ends: 144 [2021-05-22 02:21:18,999 INFO L226 Difference]: Without dead ends: 118 [2021-05-22 02:21:18,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 694.4ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:21:18,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-22 02:21:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2021-05-22 02:21:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1494252873563218) internal successors, (187), 87 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 187 transitions. [2021-05-22 02:21:19,000 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 187 transitions. Word has length 16 [2021-05-22 02:21:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:19,000 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 187 transitions. [2021-05-22 02:21:19,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 187 transitions. [2021-05-22 02:21:19,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:19,001 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:19,001 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:19,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:19,215 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:19,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:19,215 INFO L82 PathProgramCache]: Analyzing trace with hash 234492561, now seen corresponding path program 45 times [2021-05-22 02:21:19,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:19,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114286966] [2021-05-22 02:21:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:19,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:19,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:19,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114286966] [2021-05-22 02:21:19,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114286966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:19,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035862730] [2021-05-22 02:21:19,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:19,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:21:19,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:19,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:19,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:19,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035862730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:19,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:19,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:19,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284238409] [2021-05-22 02:21:19,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:19,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:19,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:19,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:19,682 INFO L87 Difference]: Start difference. First operand 88 states and 187 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:20,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:20,339 INFO L93 Difference]: Finished difference Result 141 states and 272 transitions. [2021-05-22 02:21:20,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:21:20,340 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:20,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:20,340 INFO L225 Difference]: With dead ends: 141 [2021-05-22 02:21:20,340 INFO L226 Difference]: Without dead ends: 116 [2021-05-22 02:21:20,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 855.9ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:21:20,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-22 02:21:20,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 91. [2021-05-22 02:21:20,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1666666666666665) internal successors, (195), 90 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:20,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 195 transitions. [2021-05-22 02:21:20,342 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 195 transitions. Word has length 16 [2021-05-22 02:21:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:20,342 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 195 transitions. [2021-05-22 02:21:20,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 195 transitions. [2021-05-22 02:21:20,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:20,342 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:20,342 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:20,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:20,548 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:20,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1031228313, now seen corresponding path program 46 times [2021-05-22 02:21:20,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:20,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972896055] [2021-05-22 02:21:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:20,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:20,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972896055] [2021-05-22 02:21:20,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972896055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:20,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790062297] [2021-05-22 02:21:20,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:20,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:21:20,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:20,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:20,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:20,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790062297] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:20,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:20,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:20,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263172885] [2021-05-22 02:21:20,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:20,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:20,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:20,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:20,982 INFO L87 Difference]: Start difference. First operand 91 states and 195 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:21,387 INFO L93 Difference]: Finished difference Result 150 states and 295 transitions. [2021-05-22 02:21:21,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:21:21,387 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:21,388 INFO L225 Difference]: With dead ends: 150 [2021-05-22 02:21:21,388 INFO L226 Difference]: Without dead ends: 124 [2021-05-22 02:21:21,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 585.1ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:21:21,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-22 02:21:21,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2021-05-22 02:21:21,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:21,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-05-22 02:21:21,390 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 16 [2021-05-22 02:21:21,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:21,390 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-05-22 02:21:21,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:21,390 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-05-22 02:21:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:21,390 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:21,390 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:21,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2021-05-22 02:21:21,605 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:21,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:21,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1248642377, now seen corresponding path program 47 times [2021-05-22 02:21:21,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:21,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604449709] [2021-05-22 02:21:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:21,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:21,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604449709] [2021-05-22 02:21:21,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604449709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:21,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752056330] [2021-05-22 02:21:21,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:21,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:21:21,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:21,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:21,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:22,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752056330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:22,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:22,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:22,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010937684] [2021-05-22 02:21:22,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:22,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:22,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:22,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:22,111 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:22,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:22,636 INFO L93 Difference]: Finished difference Result 176 states and 339 transitions. [2021-05-22 02:21:22,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:21:22,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:22,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:22,637 INFO L225 Difference]: With dead ends: 176 [2021-05-22 02:21:22,637 INFO L226 Difference]: Without dead ends: 158 [2021-05-22 02:21:22,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 751.6ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:21:22,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-22 02:21:22,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 97. [2021-05-22 02:21:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-05-22 02:21:22,639 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 16 [2021-05-22 02:21:22,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:22,639 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-05-22 02:21:22,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:22,639 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-05-22 02:21:22,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:22,639 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:22,639 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:22,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:22,853 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:22,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:22,853 INFO L82 PathProgramCache]: Analyzing trace with hash -565135694, now seen corresponding path program 48 times [2021-05-22 02:21:22,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:22,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541936619] [2021-05-22 02:21:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:21:22,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:22,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541936619] [2021-05-22 02:21:22,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541936619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:22,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007818945] [2021-05-22 02:21:22,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:22,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:21:22,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:22,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:21:22,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:21:23,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007818945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:23,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:23,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:21:23,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875197369] [2021-05-22 02:21:23,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:21:23,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:23,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:21:23,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:21:23,033 INFO L87 Difference]: Start difference. First operand 97 states and 212 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:23,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:23,059 INFO L93 Difference]: Finished difference Result 99 states and 210 transitions. [2021-05-22 02:21:23,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:21:23,059 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:23,060 INFO L225 Difference]: With dead ends: 99 [2021-05-22 02:21:23,060 INFO L226 Difference]: Without dead ends: 99 [2021-05-22 02:21:23,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:21:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-22 02:21:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2021-05-22 02:21:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.176470588235294) internal successors, (185), 85 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 185 transitions. [2021-05-22 02:21:23,061 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 185 transitions. Word has length 16 [2021-05-22 02:21:23,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:23,061 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 185 transitions. [2021-05-22 02:21:23,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 185 transitions. [2021-05-22 02:21:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:23,062 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:23,062 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:23,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:23,281 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:23,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:23,281 INFO L82 PathProgramCache]: Analyzing trace with hash 85948953, now seen corresponding path program 49 times [2021-05-22 02:21:23,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:23,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917687339] [2021-05-22 02:21:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:23,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:23,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917687339] [2021-05-22 02:21:23,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917687339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:23,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527026571] [2021-05-22 02:21:23,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:23,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:23,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:23,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527026571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:23,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:23,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:23,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594632460] [2021-05-22 02:21:23,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:23,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:23,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:23,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:23,712 INFO L87 Difference]: Start difference. First operand 86 states and 185 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:24,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:24,236 INFO L93 Difference]: Finished difference Result 159 states and 305 transitions. [2021-05-22 02:21:24,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:21:24,237 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:24,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:24,237 INFO L225 Difference]: With dead ends: 159 [2021-05-22 02:21:24,237 INFO L226 Difference]: Without dead ends: 140 [2021-05-22 02:21:24,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 670.1ms TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:21:24,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-22 02:21:24,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 89. [2021-05-22 02:21:24,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.215909090909091) internal successors, (195), 88 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 195 transitions. [2021-05-22 02:21:24,241 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 195 transitions. Word has length 16 [2021-05-22 02:21:24,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:24,241 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 195 transitions. [2021-05-22 02:21:24,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:24,241 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 195 transitions. [2021-05-22 02:21:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:24,241 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:24,241 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:24,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:24,449 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:24,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:24,449 INFO L82 PathProgramCache]: Analyzing trace with hash -451906625, now seen corresponding path program 50 times [2021-05-22 02:21:24,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:24,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602900033] [2021-05-22 02:21:24,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:24,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:24,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602900033] [2021-05-22 02:21:24,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602900033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:24,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705275734] [2021-05-22 02:21:24,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:24,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:21:24,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:24,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:24,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:24,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705275734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:24,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:24,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:24,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434049406] [2021-05-22 02:21:24,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:24,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:24,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:24,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:24,854 INFO L87 Difference]: Start difference. First operand 89 states and 195 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:25,472 INFO L93 Difference]: Finished difference Result 146 states and 293 transitions. [2021-05-22 02:21:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:21:25,472 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:25,472 INFO L225 Difference]: With dead ends: 146 [2021-05-22 02:21:25,472 INFO L226 Difference]: Without dead ends: 106 [2021-05-22 02:21:25,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 760.7ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:21:25,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-22 02:21:25,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2021-05-22 02:21:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.215909090909091) internal successors, (195), 88 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 195 transitions. [2021-05-22 02:21:25,474 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 195 transitions. Word has length 16 [2021-05-22 02:21:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:25,474 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 195 transitions. [2021-05-22 02:21:25,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:25,474 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 195 transitions. [2021-05-22 02:21:25,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:25,474 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:25,474 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:25,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:25,681 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:25,681 INFO L82 PathProgramCache]: Analyzing trace with hash 54439641, now seen corresponding path program 51 times [2021-05-22 02:21:25,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:25,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961073506] [2021-05-22 02:21:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:25,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:25,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961073506] [2021-05-22 02:21:25,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961073506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:25,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146949446] [2021-05-22 02:21:25,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:25,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:21:25,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:25,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:25,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:26,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146949446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:26,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:26,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:26,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507508581] [2021-05-22 02:21:26,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:26,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:26,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:26,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:26,093 INFO L87 Difference]: Start difference. First operand 89 states and 195 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:26,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:26,807 INFO L93 Difference]: Finished difference Result 184 states and 344 transitions. [2021-05-22 02:21:26,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:21:26,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:26,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:26,808 INFO L225 Difference]: With dead ends: 184 [2021-05-22 02:21:26,808 INFO L226 Difference]: Without dead ends: 149 [2021-05-22 02:21:26,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 841.6ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:21:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-22 02:21:26,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 91. [2021-05-22 02:21:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.2111111111111112) internal successors, (199), 90 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:26,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 199 transitions. [2021-05-22 02:21:26,809 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 199 transitions. Word has length 16 [2021-05-22 02:21:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:26,810 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 199 transitions. [2021-05-22 02:21:26,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:26,810 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 199 transitions. [2021-05-22 02:21:26,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:26,810 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:26,810 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:27,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-05-22 02:21:27,010 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:27,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:27,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2140856799, now seen corresponding path program 52 times [2021-05-22 02:21:27,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:27,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688239330] [2021-05-22 02:21:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:27,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:27,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688239330] [2021-05-22 02:21:27,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688239330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:27,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872305142] [2021-05-22 02:21:27,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:27,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:21:27,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:27,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:27,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:27,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872305142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:27,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:27,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-22 02:21:27,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206758916] [2021-05-22 02:21:27,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:21:27,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:27,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:21:27,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:21:27,451 INFO L87 Difference]: Start difference. First operand 91 states and 199 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:27,787 INFO L93 Difference]: Finished difference Result 107 states and 224 transitions. [2021-05-22 02:21:27,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:21:27,787 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:27,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:27,787 INFO L225 Difference]: With dead ends: 107 [2021-05-22 02:21:27,788 INFO L226 Difference]: Without dead ends: 100 [2021-05-22 02:21:27,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 573.3ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:21:27,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-22 02:21:27,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2021-05-22 02:21:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-05-22 02:21:27,789 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 16 [2021-05-22 02:21:27,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:27,789 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-05-22 02:21:27,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-05-22 02:21:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:27,789 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:27,790 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:28,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-05-22 02:21:28,001 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:28,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:28,002 INFO L82 PathProgramCache]: Analyzing trace with hash 576768767, now seen corresponding path program 53 times [2021-05-22 02:21:28,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:28,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998873118] [2021-05-22 02:21:28,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:28,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:28,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998873118] [2021-05-22 02:21:28,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998873118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:28,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676477182] [2021-05-22 02:21:28,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:28,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:21:28,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:28,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:28,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:28,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676477182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:28,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:28,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:28,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602416602] [2021-05-22 02:21:28,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:28,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:28,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:28,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:28,396 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:28,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:28,990 INFO L93 Difference]: Finished difference Result 138 states and 276 transitions. [2021-05-22 02:21:28,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:21:28,991 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:28,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:28,991 INFO L225 Difference]: With dead ends: 138 [2021-05-22 02:21:28,991 INFO L226 Difference]: Without dead ends: 131 [2021-05-22 02:21:28,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 689.9ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:21:28,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-22 02:21:28,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 95. [2021-05-22 02:21:28,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.2127659574468086) internal successors, (208), 94 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 208 transitions. [2021-05-22 02:21:28,993 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 208 transitions. Word has length 16 [2021-05-22 02:21:28,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:28,993 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 208 transitions. [2021-05-22 02:21:28,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:28,993 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 208 transitions. [2021-05-22 02:21:28,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:28,993 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:28,993 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:29,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-05-22 02:21:29,209 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:29,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:29,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1911360097, now seen corresponding path program 54 times [2021-05-22 02:21:29,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:29,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761728661] [2021-05-22 02:21:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:29,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:29,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761728661] [2021-05-22 02:21:29,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761728661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:29,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681000290] [2021-05-22 02:21:29,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:29,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:21:29,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:29,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:29,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:29,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681000290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:29,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:29,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:29,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115894938] [2021-05-22 02:21:29,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:29,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:29,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:29,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:29,612 INFO L87 Difference]: Start difference. First operand 95 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:30,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:30,036 INFO L93 Difference]: Finished difference Result 146 states and 288 transitions. [2021-05-22 02:21:30,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:21:30,037 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:30,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:30,037 INFO L225 Difference]: With dead ends: 146 [2021-05-22 02:21:30,037 INFO L226 Difference]: Without dead ends: 120 [2021-05-22 02:21:30,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 583.5ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:21:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-22 02:21:30,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2021-05-22 02:21:30,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.204301075268817) internal successors, (205), 93 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 205 transitions. [2021-05-22 02:21:30,039 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 205 transitions. Word has length 16 [2021-05-22 02:21:30,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:30,039 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 205 transitions. [2021-05-22 02:21:30,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:30,039 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 205 transitions. [2021-05-22 02:21:30,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:30,039 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:30,039 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:30,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-05-22 02:21:30,239 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:30,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:30,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1290310270, now seen corresponding path program 55 times [2021-05-22 02:21:30,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:30,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379478187] [2021-05-22 02:21:30,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:21:30,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:30,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379478187] [2021-05-22 02:21:30,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379478187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:30,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842687136] [2021-05-22 02:21:30,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:30,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:21:30,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:21:30,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842687136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:30,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:30,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:21:30,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698471593] [2021-05-22 02:21:30,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:21:30,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:30,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:21:30,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:21:30,360 INFO L87 Difference]: Start difference. First operand 94 states and 205 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:30,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:30,416 INFO L93 Difference]: Finished difference Result 112 states and 241 transitions. [2021-05-22 02:21:30,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:21:30,417 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:30,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:30,417 INFO L225 Difference]: With dead ends: 112 [2021-05-22 02:21:30,417 INFO L226 Difference]: Without dead ends: 112 [2021-05-22 02:21:30,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:21:30,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-22 02:21:30,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2021-05-22 02:21:30,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.2065217391304346) internal successors, (203), 92 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 203 transitions. [2021-05-22 02:21:30,419 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 203 transitions. Word has length 16 [2021-05-22 02:21:30,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:30,419 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 203 transitions. [2021-05-22 02:21:30,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 203 transitions. [2021-05-22 02:21:30,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:30,419 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:30,419 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:30,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:30,621 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:30,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:30,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1083115033, now seen corresponding path program 56 times [2021-05-22 02:21:30,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:30,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92371548] [2021-05-22 02:21:30,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:30,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:30,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92371548] [2021-05-22 02:21:30,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92371548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:30,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078925721] [2021-05-22 02:21:30,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:30,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:21:30,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:30,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:30,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:31,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078925721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:31,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:31,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:31,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608960465] [2021-05-22 02:21:31,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:31,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:31,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:31,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:31,068 INFO L87 Difference]: Start difference. First operand 93 states and 203 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:31,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:31,573 INFO L93 Difference]: Finished difference Result 152 states and 301 transitions. [2021-05-22 02:21:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:21:31,573 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:31,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:31,573 INFO L225 Difference]: With dead ends: 152 [2021-05-22 02:21:31,573 INFO L226 Difference]: Without dead ends: 132 [2021-05-22 02:21:31,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 714.5ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:21:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-22 02:21:31,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 98. [2021-05-22 02:21:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2061855670103094) internal successors, (214), 97 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:31,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 214 transitions. [2021-05-22 02:21:31,575 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 214 transitions. Word has length 16 [2021-05-22 02:21:31,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:31,575 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 214 transitions. [2021-05-22 02:21:31,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:31,575 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 214 transitions. [2021-05-22 02:21:31,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:31,575 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:31,576 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:31,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:31,786 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:31,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:31,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1877260933, now seen corresponding path program 57 times [2021-05-22 02:21:31,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:31,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330494035] [2021-05-22 02:21:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:31,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:31,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330494035] [2021-05-22 02:21:31,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330494035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:31,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59645415] [2021-05-22 02:21:31,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:31,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:21:31,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:31,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:31,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:32,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59645415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:32,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:32,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:32,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111662271] [2021-05-22 02:21:32,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:32,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:32,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:32,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:32,202 INFO L87 Difference]: Start difference. First operand 98 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:32,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:32,594 INFO L93 Difference]: Finished difference Result 148 states and 293 transitions. [2021-05-22 02:21:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:21:32,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:32,594 INFO L225 Difference]: With dead ends: 148 [2021-05-22 02:21:32,594 INFO L226 Difference]: Without dead ends: 127 [2021-05-22 02:21:32,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 542.4ms TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:21:32,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-22 02:21:32,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2021-05-22 02:21:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:32,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-05-22 02:21:32,596 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 16 [2021-05-22 02:21:32,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:32,596 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-05-22 02:21:32,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:32,596 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-05-22 02:21:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:32,596 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:32,596 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:32,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:32,801 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:32,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:32,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1879850785, now seen corresponding path program 58 times [2021-05-22 02:21:32,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:32,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628833808] [2021-05-22 02:21:32,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:32,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:32,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628833808] [2021-05-22 02:21:32,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628833808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:32,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987563774] [2021-05-22 02:21:32,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:32,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:21:32,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:32,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:32,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:33,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987563774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:33,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:33,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:33,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037341204] [2021-05-22 02:21:33,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:33,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:33,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:33,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:33,216 INFO L87 Difference]: Start difference. First operand 97 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:33,801 INFO L93 Difference]: Finished difference Result 171 states and 342 transitions. [2021-05-22 02:21:33,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:21:33,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:33,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:33,802 INFO L225 Difference]: With dead ends: 171 [2021-05-22 02:21:33,802 INFO L226 Difference]: Without dead ends: 145 [2021-05-22 02:21:33,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 726.3ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:21:33,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-22 02:21:33,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 100. [2021-05-22 02:21:33,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2323232323232323) internal successors, (221), 99 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 221 transitions. [2021-05-22 02:21:33,803 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 221 transitions. Word has length 16 [2021-05-22 02:21:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:33,804 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 221 transitions. [2021-05-22 02:21:33,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 221 transitions. [2021-05-22 02:21:33,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:33,804 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:33,804 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:34,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-05-22 02:21:34,020 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:34,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:34,020 INFO L82 PathProgramCache]: Analyzing trace with hash -400019905, now seen corresponding path program 59 times [2021-05-22 02:21:34,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:34,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144743022] [2021-05-22 02:21:34,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:34,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:34,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144743022] [2021-05-22 02:21:34,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144743022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:34,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982622912] [2021-05-22 02:21:34,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:34,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:21:34,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:34,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:34,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:34,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982622912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:34,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:34,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:34,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573642406] [2021-05-22 02:21:34,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:34,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:34,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:34,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:34,474 INFO L87 Difference]: Start difference. First operand 100 states and 221 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:34,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:34,817 INFO L93 Difference]: Finished difference Result 131 states and 273 transitions. [2021-05-22 02:21:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:21:34,817 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:34,818 INFO L225 Difference]: With dead ends: 131 [2021-05-22 02:21:34,818 INFO L226 Difference]: Without dead ends: 120 [2021-05-22 02:21:34,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 545.5ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:21:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-22 02:21:34,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-05-22 02:21:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.227722772277228) internal successors, (225), 101 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:34,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 225 transitions. [2021-05-22 02:21:34,820 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 225 transitions. Word has length 16 [2021-05-22 02:21:34,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:34,820 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 225 transitions. [2021-05-22 02:21:34,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:34,820 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 225 transitions. [2021-05-22 02:21:34,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:34,820 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:34,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:35,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:35,029 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:35,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:35,029 INFO L82 PathProgramCache]: Analyzing trace with hash 934571425, now seen corresponding path program 60 times [2021-05-22 02:21:35,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:35,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242885590] [2021-05-22 02:21:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:35,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:35,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242885590] [2021-05-22 02:21:35,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242885590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:35,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710214150] [2021-05-22 02:21:35,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:35,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:21:35,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:35,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:35,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:35,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710214150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:35,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:35,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:35,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89779864] [2021-05-22 02:21:35,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:35,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:35,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:35,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:35,392 INFO L87 Difference]: Start difference. First operand 102 states and 225 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:36,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:36,000 INFO L93 Difference]: Finished difference Result 178 states and 347 transitions. [2021-05-22 02:21:36,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:21:36,000 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:36,001 INFO L225 Difference]: With dead ends: 178 [2021-05-22 02:21:36,001 INFO L226 Difference]: Without dead ends: 159 [2021-05-22 02:21:36,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 700.0ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:21:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-22 02:21:36,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 104. [2021-05-22 02:21:36,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2427184466019416) internal successors, (231), 103 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:36,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 231 transitions. [2021-05-22 02:21:36,003 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 231 transitions. Word has length 16 [2021-05-22 02:21:36,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:36,003 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 231 transitions. [2021-05-22 02:21:36,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:36,003 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 231 transitions. [2021-05-22 02:21:36,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:36,003 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:36,003 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:36,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-05-22 02:21:36,217 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:36,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:36,217 INFO L82 PathProgramCache]: Analyzing trace with hash 396715847, now seen corresponding path program 61 times [2021-05-22 02:21:36,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:36,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494752531] [2021-05-22 02:21:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:36,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:36,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494752531] [2021-05-22 02:21:36,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494752531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:36,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97737835] [2021-05-22 02:21:36,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:36,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:36,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:36,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97737835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:36,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:36,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:36,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842802508] [2021-05-22 02:21:36,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:36,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:36,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:36,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:36,614 INFO L87 Difference]: Start difference. First operand 104 states and 231 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:37,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:37,180 INFO L93 Difference]: Finished difference Result 161 states and 329 transitions. [2021-05-22 02:21:37,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:21:37,181 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:37,181 INFO L225 Difference]: With dead ends: 161 [2021-05-22 02:21:37,181 INFO L226 Difference]: Without dead ends: 132 [2021-05-22 02:21:37,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 671.0ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:21:37,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-22 02:21:37,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2021-05-22 02:21:37,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.2641509433962264) internal successors, (240), 106 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 240 transitions. [2021-05-22 02:21:37,183 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 240 transitions. Word has length 16 [2021-05-22 02:21:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:37,183 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 240 transitions. [2021-05-22 02:21:37,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:37,183 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 240 transitions. [2021-05-22 02:21:37,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:37,183 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:37,183 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:37,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:37,399 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:37,399 INFO L82 PathProgramCache]: Analyzing trace with hash 189520610, now seen corresponding path program 62 times [2021-05-22 02:21:37,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:37,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133007941] [2021-05-22 02:21:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:21:37,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:37,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133007941] [2021-05-22 02:21:37,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133007941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:37,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637399246] [2021-05-22 02:21:37,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:37,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:21:37,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:37,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:21:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:21:37,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637399246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:37,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:37,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:21:37,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813614589] [2021-05-22 02:21:37,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:21:37,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:37,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:21:37,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:21:37,516 INFO L87 Difference]: Start difference. First operand 107 states and 240 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:37,633 INFO L93 Difference]: Finished difference Result 163 states and 332 transitions. [2021-05-22 02:21:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:21:37,634 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:37,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:37,634 INFO L225 Difference]: With dead ends: 163 [2021-05-22 02:21:37,634 INFO L226 Difference]: Without dead ends: 163 [2021-05-22 02:21:37,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:21:37,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-22 02:21:37,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2021-05-22 02:21:37,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.293577981651376) internal successors, (250), 109 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 250 transitions. [2021-05-22 02:21:37,636 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 250 transitions. Word has length 16 [2021-05-22 02:21:37,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:37,636 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 250 transitions. [2021-05-22 02:21:37,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:37,637 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 250 transitions. [2021-05-22 02:21:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:37,637 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:37,637 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:37,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-05-22 02:21:37,852 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:37,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:37,852 INFO L82 PathProgramCache]: Analyzing trace with hash 903062113, now seen corresponding path program 63 times [2021-05-22 02:21:37,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:37,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574006358] [2021-05-22 02:21:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:37,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:37,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574006358] [2021-05-22 02:21:37,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574006358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:37,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393707269] [2021-05-22 02:21:37,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:37,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:21:37,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:37,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:37,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:38,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393707269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:38,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:38,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:38,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911784986] [2021-05-22 02:21:38,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:38,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:38,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:38,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:38,258 INFO L87 Difference]: Start difference. First operand 110 states and 250 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:39,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:39,574 INFO L93 Difference]: Finished difference Result 219 states and 429 transitions. [2021-05-22 02:21:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:21:39,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:39,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:39,575 INFO L225 Difference]: With dead ends: 219 [2021-05-22 02:21:39,575 INFO L226 Difference]: Without dead ends: 151 [2021-05-22 02:21:39,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1443.5ms TimeCoverageRelationStatistics Valid=348, Invalid=1134, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:21:39,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-22 02:21:39,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 115. [2021-05-22 02:21:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.280701754385965) internal successors, (260), 114 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:39,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 260 transitions. [2021-05-22 02:21:39,577 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 260 transitions. Word has length 16 [2021-05-22 02:21:39,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:39,577 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 260 transitions. [2021-05-22 02:21:39,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:39,577 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 260 transitions. [2021-05-22 02:21:39,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:39,578 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:39,578 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:39,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-05-22 02:21:39,778 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:39,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:39,779 INFO L82 PathProgramCache]: Analyzing trace with hash 695866876, now seen corresponding path program 64 times [2021-05-22 02:21:39,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:39,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192917252] [2021-05-22 02:21:39,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:21:39,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:39,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192917252] [2021-05-22 02:21:39,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192917252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:39,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273182541] [2021-05-22 02:21:39,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:39,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:21:39,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:39,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-22 02:21:39,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:21:39,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273182541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:39,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:39,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-22 02:21:39,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890403160] [2021-05-22 02:21:39,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-22 02:21:39,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:39,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-22 02:21:39,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:21:39,897 INFO L87 Difference]: Start difference. First operand 115 states and 260 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:39,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:39,933 INFO L93 Difference]: Finished difference Result 127 states and 279 transitions. [2021-05-22 02:21:39,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-22 02:21:39,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:39,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:39,934 INFO L225 Difference]: With dead ends: 127 [2021-05-22 02:21:39,934 INFO L226 Difference]: Without dead ends: 127 [2021-05-22 02:21:39,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-22 02:21:39,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-22 02:21:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2021-05-22 02:21:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.25) internal successors, (252), 112 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 252 transitions. [2021-05-22 02:21:39,936 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 252 transitions. Word has length 16 [2021-05-22 02:21:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:39,936 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 252 transitions. [2021-05-22 02:21:39,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 252 transitions. [2021-05-22 02:21:39,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:39,936 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:39,936 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:40,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-05-22 02:21:40,152 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:40,152 INFO L82 PathProgramCache]: Analyzing trace with hash 444951547, now seen corresponding path program 65 times [2021-05-22 02:21:40,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:40,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131850013] [2021-05-22 02:21:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:40,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:40,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131850013] [2021-05-22 02:21:40,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131850013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:40,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674344022] [2021-05-22 02:21:40,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:40,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:21:40,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:40,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:40,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:40,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674344022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:40,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:40,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:40,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122682192] [2021-05-22 02:21:40,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:40,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:40,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:40,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:40,639 INFO L87 Difference]: Start difference. First operand 113 states and 252 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:40,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:40,927 INFO L93 Difference]: Finished difference Result 149 states and 313 transitions. [2021-05-22 02:21:40,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:21:40,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:40,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:40,928 INFO L225 Difference]: With dead ends: 149 [2021-05-22 02:21:40,928 INFO L226 Difference]: Without dead ends: 138 [2021-05-22 02:21:40,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 545.1ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:21:40,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-22 02:21:40,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 115. [2021-05-22 02:21:40,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.245614035087719) internal successors, (256), 114 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 256 transitions. [2021-05-22 02:21:40,930 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 256 transitions. Word has length 16 [2021-05-22 02:21:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:40,930 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 256 transitions. [2021-05-22 02:21:40,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 256 transitions. [2021-05-22 02:21:40,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:40,930 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:40,930 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:41,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-05-22 02:21:41,145 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:41,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:41,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1779542877, now seen corresponding path program 66 times [2021-05-22 02:21:41,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:41,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712666984] [2021-05-22 02:21:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:41,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:41,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712666984] [2021-05-22 02:21:41,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712666984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:41,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981284959] [2021-05-22 02:21:41,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:41,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:21:41,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:41,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:41,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:41,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981284959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:41,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:41,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:41,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477541632] [2021-05-22 02:21:41,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:41,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:41,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:41,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:41,599 INFO L87 Difference]: Start difference. First operand 115 states and 256 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:41,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:41,970 INFO L93 Difference]: Finished difference Result 160 states and 331 transitions. [2021-05-22 02:21:41,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:21:41,971 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:41,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:41,971 INFO L225 Difference]: With dead ends: 160 [2021-05-22 02:21:41,971 INFO L226 Difference]: Without dead ends: 141 [2021-05-22 02:21:41,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 564.8ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:21:41,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-22 02:21:41,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 114. [2021-05-22 02:21:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.247787610619469) internal successors, (254), 113 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 254 transitions. [2021-05-22 02:21:41,973 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 254 transitions. Word has length 16 [2021-05-22 02:21:41,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:41,973 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 254 transitions. [2021-05-22 02:21:41,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:41,973 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 254 transitions. [2021-05-22 02:21:41,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:41,973 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:41,973 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:42,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-05-22 02:21:42,188 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:42,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:42,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1241687299, now seen corresponding path program 67 times [2021-05-22 02:21:42,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:42,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618350552] [2021-05-22 02:21:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:42,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:42,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618350552] [2021-05-22 02:21:42,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618350552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:42,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107691608] [2021-05-22 02:21:42,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:42,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:42,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:42,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107691608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:42,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:42,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:42,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853442414] [2021-05-22 02:21:42,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:42,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:42,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:42,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:42,606 INFO L87 Difference]: Start difference. First operand 114 states and 254 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:43,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:43,123 INFO L93 Difference]: Finished difference Result 167 states and 349 transitions. [2021-05-22 02:21:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:21:43,123 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:43,124 INFO L225 Difference]: With dead ends: 167 [2021-05-22 02:21:43,124 INFO L226 Difference]: Without dead ends: 145 [2021-05-22 02:21:43,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 662.1ms TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:21:43,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-22 02:21:43,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 114. [2021-05-22 02:21:43,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.247787610619469) internal successors, (254), 113 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 254 transitions. [2021-05-22 02:21:43,126 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 254 transitions. Word has length 16 [2021-05-22 02:21:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:43,126 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 254 transitions. [2021-05-22 02:21:43,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 254 transitions. [2021-05-22 02:21:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:43,126 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:43,126 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:43,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:43,326 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:43,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:43,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1748033565, now seen corresponding path program 68 times [2021-05-22 02:21:43,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:43,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161709534] [2021-05-22 02:21:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:43,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:43,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161709534] [2021-05-22 02:21:43,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161709534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:43,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497160756] [2021-05-22 02:21:43,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:43,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:21:43,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:43,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:21:43,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:43,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497160756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:43,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:43,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:43,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970217027] [2021-05-22 02:21:43,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:43,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:43,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:43,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:43,741 INFO L87 Difference]: Start difference. First operand 114 states and 254 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:44,346 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-05-22 02:21:44,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:44,412 INFO L93 Difference]: Finished difference Result 201 states and 395 transitions. [2021-05-22 02:21:44,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:21:44,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:44,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:44,413 INFO L225 Difference]: With dead ends: 201 [2021-05-22 02:21:44,413 INFO L226 Difference]: Without dead ends: 166 [2021-05-22 02:21:44,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 787.4ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:21:44,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-22 02:21:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2021-05-22 02:21:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.247787610619469) internal successors, (254), 113 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 254 transitions. [2021-05-22 02:21:44,415 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 254 transitions. Word has length 16 [2021-05-22 02:21:44,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:44,415 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 254 transitions. [2021-05-22 02:21:44,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 254 transitions. [2021-05-22 02:21:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-22 02:21:44,415 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:44,415 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:44,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:44,615 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:44,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:44,616 INFO L82 PathProgramCache]: Analyzing trace with hash -2104034591, now seen corresponding path program 69 times [2021-05-22 02:21:44,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:44,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580794148] [2021-05-22 02:21:44,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:44,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:44,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580794148] [2021-05-22 02:21:44,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580794148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:44,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697964994] [2021-05-22 02:21:44,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:44,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:21:44,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:44,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:21:44,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:45,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697964994] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:45,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:45,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-22 02:21:45,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450722581] [2021-05-22 02:21:45,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:21:45,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:45,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:21:45,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:45,032 INFO L87 Difference]: Start difference. First operand 114 states and 254 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:45,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:45,743 INFO L93 Difference]: Finished difference Result 187 states and 386 transitions. [2021-05-22 02:21:45,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:21:45,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-22 02:21:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:45,744 INFO L225 Difference]: With dead ends: 187 [2021-05-22 02:21:45,744 INFO L226 Difference]: Without dead ends: 156 [2021-05-22 02:21:45,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 878.8ms TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:21:45,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-22 02:21:45,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2021-05-22 02:21:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2413793103448274) internal successors, (260), 116 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:45,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 260 transitions. [2021-05-22 02:21:45,745 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 260 transitions. Word has length 16 [2021-05-22 02:21:45,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:45,745 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 260 transitions. [2021-05-22 02:21:45,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:45,746 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 260 transitions. [2021-05-22 02:21:45,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:45,746 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:45,746 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:45,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:45,957 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:45,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:45,957 INFO L82 PathProgramCache]: Analyzing trace with hash -570507776, now seen corresponding path program 70 times [2021-05-22 02:21:45,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:45,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633150170] [2021-05-22 02:21:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:46,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:46,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633150170] [2021-05-22 02:21:46,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633150170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:46,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236024608] [2021-05-22 02:21:46,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:46,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:21:46,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:46,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:46,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:46,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236024608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:46,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:46,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-22 02:21:46,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012825980] [2021-05-22 02:21:46,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-22 02:21:46,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:46,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-22 02:21:46,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-22 02:21:46,135 INFO L87 Difference]: Start difference. First operand 117 states and 260 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:46,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:46,207 INFO L93 Difference]: Finished difference Result 159 states and 338 transitions. [2021-05-22 02:21:46,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:21:46,207 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:46,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:46,207 INFO L225 Difference]: With dead ends: 159 [2021-05-22 02:21:46,207 INFO L226 Difference]: Without dead ends: 159 [2021-05-22 02:21:46,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-22 02:21:46,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2021-05-22 02:21:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:46,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-05-22 02:21:46,209 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-05-22 02:21:46,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:46,209 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-05-22 02:21:46,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:46,209 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-05-22 02:21:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:46,210 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:46,210 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:46,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2021-05-22 02:21:46,425 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:46,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:46,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1010264140, now seen corresponding path program 71 times [2021-05-22 02:21:46,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:46,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506318001] [2021-05-22 02:21:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:46,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:46,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506318001] [2021-05-22 02:21:46,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506318001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:46,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310278496] [2021-05-22 02:21:46,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:46,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:21:46,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:46,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:46,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310278496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:46,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:46,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-22 02:21:46,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745765535] [2021-05-22 02:21:46,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:21:46,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:46,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:21:46,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:21:46,644 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:46,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:46,954 INFO L93 Difference]: Finished difference Result 174 states and 368 transitions. [2021-05-22 02:21:46,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:21:46,954 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:46,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:46,955 INFO L225 Difference]: With dead ends: 174 [2021-05-22 02:21:46,955 INFO L226 Difference]: Without dead ends: 174 [2021-05-22 02:21:46,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 336.7ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:21:46,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-22 02:21:46,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 118. [2021-05-22 02:21:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-05-22 02:21:46,957 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-05-22 02:21:46,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:46,957 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-05-22 02:21:46,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:46,957 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-05-22 02:21:46,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:46,957 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:46,957 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:47,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-05-22 02:21:47,158 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:47,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:47,158 INFO L82 PathProgramCache]: Analyzing trace with hash -60731324, now seen corresponding path program 72 times [2021-05-22 02:21:47,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:47,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269542192] [2021-05-22 02:21:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:47,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:47,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269542192] [2021-05-22 02:21:47,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269542192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:47,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11081591] [2021-05-22 02:21:47,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:47,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:21:47,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:47,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:47,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:47,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11081591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:47,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:47,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:47,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775586853] [2021-05-22 02:21:47,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:47,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:47,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:47,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:47,430 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:47,607 INFO L93 Difference]: Finished difference Result 168 states and 356 transitions. [2021-05-22 02:21:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:21:47,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:47,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:47,608 INFO L225 Difference]: With dead ends: 168 [2021-05-22 02:21:47,608 INFO L226 Difference]: Without dead ends: 168 [2021-05-22 02:21:47,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:21:47,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-22 02:21:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 118. [2021-05-22 02:21:47,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:47,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-05-22 02:21:47,610 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-05-22 02:21:47,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:47,610 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-05-22 02:21:47,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-05-22 02:21:47,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:47,611 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:47,611 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:47,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-05-22 02:21:47,827 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:47,827 INFO L82 PathProgramCache]: Analyzing trace with hash 736004428, now seen corresponding path program 73 times [2021-05-22 02:21:47,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:47,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732975759] [2021-05-22 02:21:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:47,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:47,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732975759] [2021-05-22 02:21:47,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732975759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:47,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169258744] [2021-05-22 02:21:47,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:47,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:47,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:48,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169258744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:48,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:48,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:48,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509464821] [2021-05-22 02:21:48,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:48,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:48,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:48,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:48,018 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:48,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:48,207 INFO L93 Difference]: Finished difference Result 170 states and 355 transitions. [2021-05-22 02:21:48,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:21:48,208 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:48,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:48,208 INFO L225 Difference]: With dead ends: 170 [2021-05-22 02:21:48,208 INFO L226 Difference]: Without dead ends: 167 [2021-05-22 02:21:48,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:21:48,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-22 02:21:48,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 118. [2021-05-22 02:21:48,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:48,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-05-22 02:21:48,210 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-05-22 02:21:48,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:48,210 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-05-22 02:21:48,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:48,210 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-05-22 02:21:48,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:48,211 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:48,211 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:48,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:48,421 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:48,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:48,421 INFO L82 PathProgramCache]: Analyzing trace with hash 528809191, now seen corresponding path program 74 times [2021-05-22 02:21:48,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:48,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215385649] [2021-05-22 02:21:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:48,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:48,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215385649] [2021-05-22 02:21:48,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215385649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:48,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442779243] [2021-05-22 02:21:48,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:48,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:21:48,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:48,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:48,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:48,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442779243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:48,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:48,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:48,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513577477] [2021-05-22 02:21:48,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:48,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:48,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:48,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:48,703 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:48,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:48,892 INFO L93 Difference]: Finished difference Result 170 states and 351 transitions. [2021-05-22 02:21:48,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:21:48,892 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:48,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:48,893 INFO L225 Difference]: With dead ends: 170 [2021-05-22 02:21:48,893 INFO L226 Difference]: Without dead ends: 168 [2021-05-22 02:21:48,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:21:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-22 02:21:48,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 122. [2021-05-22 02:21:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.2479338842975207) internal successors, (272), 121 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:48,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 272 transitions. [2021-05-22 02:21:48,894 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 272 transitions. Word has length 17 [2021-05-22 02:21:48,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:48,894 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 272 transitions. [2021-05-22 02:21:48,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 272 transitions. [2021-05-22 02:21:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:48,895 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:48,895 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:49,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-05-22 02:21:49,095 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:49,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:49,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1863400521, now seen corresponding path program 75 times [2021-05-22 02:21:49,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:49,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726764394] [2021-05-22 02:21:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:49,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:49,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726764394] [2021-05-22 02:21:49,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726764394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:49,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557701305] [2021-05-22 02:21:49,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:49,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:21:49,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:49,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:49,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:49,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557701305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:49,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:49,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:49,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792332202] [2021-05-22 02:21:49,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:49,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:49,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:49,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:49,362 INFO L87 Difference]: Start difference. First operand 122 states and 272 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:49,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:49,518 INFO L93 Difference]: Finished difference Result 157 states and 332 transitions. [2021-05-22 02:21:49,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:21:49,519 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:49,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:49,519 INFO L225 Difference]: With dead ends: 157 [2021-05-22 02:21:49,519 INFO L226 Difference]: Without dead ends: 157 [2021-05-22 02:21:49,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 269.0ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:49,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-22 02:21:49,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2021-05-22 02:21:49,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-05-22 02:21:49,523 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-05-22 02:21:49,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:49,523 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-05-22 02:21:49,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:49,524 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-05-22 02:21:49,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:49,524 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:49,524 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:49,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:49,724 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:49,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:49,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1172274526, now seen corresponding path program 76 times [2021-05-22 02:21:49,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:49,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408005547] [2021-05-22 02:21:49,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:49,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:49,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408005547] [2021-05-22 02:21:49,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408005547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:49,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325918856] [2021-05-22 02:21:49,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:49,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:21:49,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:49,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:49,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:49,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325918856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:49,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:49,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-22 02:21:49,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903600271] [2021-05-22 02:21:49,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:21:49,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:21:49,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:21:49,943 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:50,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:50,106 INFO L93 Difference]: Finished difference Result 138 states and 301 transitions. [2021-05-22 02:21:50,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:21:50,106 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:50,107 INFO L225 Difference]: With dead ends: 138 [2021-05-22 02:21:50,107 INFO L226 Difference]: Without dead ends: 138 [2021-05-22 02:21:50,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:21:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-22 02:21:50,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2021-05-22 02:21:50,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.247863247863248) internal successors, (263), 117 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:50,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 263 transitions. [2021-05-22 02:21:50,108 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 263 transitions. Word has length 17 [2021-05-22 02:21:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:50,108 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 263 transitions. [2021-05-22 02:21:50,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 263 transitions. [2021-05-22 02:21:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:50,109 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:50,109 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:50,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-05-22 02:21:50,324 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:50,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:50,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2051697306, now seen corresponding path program 77 times [2021-05-22 02:21:50,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:50,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850852150] [2021-05-22 02:21:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:50,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:50,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850852150] [2021-05-22 02:21:50,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850852150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:50,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465460965] [2021-05-22 02:21:50,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:50,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:21:50,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:50,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:50,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:50,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465460965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:50,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:50,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:50,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39017911] [2021-05-22 02:21:50,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:50,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:50,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:50,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:50,528 INFO L87 Difference]: Start difference. First operand 118 states and 263 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:50,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:50,608 INFO L93 Difference]: Finished difference Result 148 states and 321 transitions. [2021-05-22 02:21:50,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:21:50,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:50,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:50,609 INFO L225 Difference]: With dead ends: 148 [2021-05-22 02:21:50,609 INFO L226 Difference]: Without dead ends: 148 [2021-05-22 02:21:50,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:50,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-22 02:21:50,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2021-05-22 02:21:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2457627118644066) internal successors, (265), 118 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 265 transitions. [2021-05-22 02:21:50,610 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 265 transitions. Word has length 17 [2021-05-22 02:21:50,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:50,610 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 265 transitions. [2021-05-22 02:21:50,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:50,610 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 265 transitions. [2021-05-22 02:21:50,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:50,611 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:50,611 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:50,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-05-22 02:21:50,825 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:50,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:50,825 INFO L82 PathProgramCache]: Analyzing trace with hash -319138145, now seen corresponding path program 78 times [2021-05-22 02:21:50,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:50,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61499834] [2021-05-22 02:21:50,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:50,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:50,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61499834] [2021-05-22 02:21:50,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61499834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:50,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314676440] [2021-05-22 02:21:50,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:50,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:21:50,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:50,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:50,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:51,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314676440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:51,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:51,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:51,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514574605] [2021-05-22 02:21:51,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:51,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:51,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:51,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:51,099 INFO L87 Difference]: Start difference. First operand 119 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:51,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:51,160 INFO L93 Difference]: Finished difference Result 135 states and 295 transitions. [2021-05-22 02:21:51,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:21:51,160 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:51,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:51,161 INFO L225 Difference]: With dead ends: 135 [2021-05-22 02:21:51,161 INFO L226 Difference]: Without dead ends: 135 [2021-05-22 02:21:51,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:51,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-22 02:21:51,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 120. [2021-05-22 02:21:51,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 267 transitions. [2021-05-22 02:21:51,163 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 267 transitions. Word has length 17 [2021-05-22 02:21:51,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:51,163 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 267 transitions. [2021-05-22 02:21:51,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:51,163 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 267 transitions. [2021-05-22 02:21:51,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:51,163 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:51,163 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:51,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:51,375 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:51,376 INFO L82 PathProgramCache]: Analyzing trace with hash 568562368, now seen corresponding path program 79 times [2021-05-22 02:21:51,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:51,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144633107] [2021-05-22 02:21:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:51,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:51,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144633107] [2021-05-22 02:21:51,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144633107] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:51,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559851190] [2021-05-22 02:21:51,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:51,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:51,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559851190] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:51,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:51,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:51,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957400080] [2021-05-22 02:21:51,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:51,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:51,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:51,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:51,609 INFO L87 Difference]: Start difference. First operand 120 states and 267 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:51,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:51,721 INFO L93 Difference]: Finished difference Result 146 states and 317 transitions. [2021-05-22 02:21:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:21:51,721 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:51,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:51,721 INFO L225 Difference]: With dead ends: 146 [2021-05-22 02:21:51,721 INFO L226 Difference]: Without dead ends: 146 [2021-05-22 02:21:51,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:21:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-22 02:21:51,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2021-05-22 02:21:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 267 transitions. [2021-05-22 02:21:51,723 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 267 transitions. Word has length 17 [2021-05-22 02:21:51,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:51,723 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 267 transitions. [2021-05-22 02:21:51,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:51,723 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 267 transitions. [2021-05-22 02:21:51,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:51,724 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:51,724 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:51,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:51,933 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:51,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:51,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1365298120, now seen corresponding path program 80 times [2021-05-22 02:21:51,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:51,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920495467] [2021-05-22 02:21:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:52,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:52,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920495467] [2021-05-22 02:21:52,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920495467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:52,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380702801] [2021-05-22 02:21:52,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:52,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:21:52,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:52,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:52,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:52,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380702801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:52,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:52,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:52,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367677164] [2021-05-22 02:21:52,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:52,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:52,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:52,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:52,246 INFO L87 Difference]: Start difference. First operand 120 states and 267 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:52,410 INFO L93 Difference]: Finished difference Result 146 states and 317 transitions. [2021-05-22 02:21:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:21:52,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:52,411 INFO L225 Difference]: With dead ends: 146 [2021-05-22 02:21:52,411 INFO L226 Difference]: Without dead ends: 146 [2021-05-22 02:21:52,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:52,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-22 02:21:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2021-05-22 02:21:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.2436974789915967) internal successors, (267), 119 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 267 transitions. [2021-05-22 02:21:52,413 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 267 transitions. Word has length 17 [2021-05-22 02:21:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:52,413 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 267 transitions. [2021-05-22 02:21:52,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 267 transitions. [2021-05-22 02:21:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:52,413 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:52,413 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:52,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-05-22 02:21:52,613 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:52,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:52,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1652848355, now seen corresponding path program 81 times [2021-05-22 02:21:52,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:52,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581406583] [2021-05-22 02:21:52,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:52,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:52,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581406583] [2021-05-22 02:21:52,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581406583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:52,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628984363] [2021-05-22 02:21:52,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:52,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:21:52,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:52,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:52,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:52,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628984363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:52,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:52,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:52,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921328075] [2021-05-22 02:21:52,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:52,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:52,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:52,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:52,903 INFO L87 Difference]: Start difference. First operand 120 states and 267 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:53,062 INFO L93 Difference]: Finished difference Result 143 states and 310 transitions. [2021-05-22 02:21:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:21:53,063 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:53,063 INFO L225 Difference]: With dead ends: 143 [2021-05-22 02:21:53,063 INFO L226 Difference]: Without dead ends: 143 [2021-05-22 02:21:53,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:21:53,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-22 02:21:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 117. [2021-05-22 02:21:53,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2327586206896552) internal successors, (259), 116 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:53,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 259 transitions. [2021-05-22 02:21:53,065 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 259 transitions. Word has length 17 [2021-05-22 02:21:53,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:53,065 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 259 transitions. [2021-05-22 02:21:53,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:53,065 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 259 transitions. [2021-05-22 02:21:53,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:53,065 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:53,065 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:53,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-05-22 02:21:53,266 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:53,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:53,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1871644386, now seen corresponding path program 82 times [2021-05-22 02:21:53,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:53,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674348839] [2021-05-22 02:21:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:53,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:53,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674348839] [2021-05-22 02:21:53,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674348839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:53,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665781231] [2021-05-22 02:21:53,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:53,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:21:53,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:53,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:53,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:53,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665781231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:53,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:53,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:53,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421024184] [2021-05-22 02:21:53,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:53,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:53,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:53,523 INFO L87 Difference]: Start difference. First operand 117 states and 259 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:53,709 INFO L93 Difference]: Finished difference Result 153 states and 321 transitions. [2021-05-22 02:21:53,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:21:53,709 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:53,709 INFO L225 Difference]: With dead ends: 153 [2021-05-22 02:21:53,710 INFO L226 Difference]: Without dead ends: 153 [2021-05-22 02:21:53,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:21:53,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-22 02:21:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 118. [2021-05-22 02:21:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.230769230769231) internal successors, (261), 117 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 261 transitions. [2021-05-22 02:21:53,711 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 261 transitions. Word has length 17 [2021-05-22 02:21:53,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:53,711 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 261 transitions. [2021-05-22 02:21:53,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:53,711 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 261 transitions. [2021-05-22 02:21:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:53,712 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:53,712 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:53,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-05-22 02:21:53,925 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:53,926 INFO L82 PathProgramCache]: Analyzing trace with hash -2135772675, now seen corresponding path program 83 times [2021-05-22 02:21:53,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:53,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891438259] [2021-05-22 02:21:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:54,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:54,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891438259] [2021-05-22 02:21:54,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891438259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:54,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083830607] [2021-05-22 02:21:54,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:54,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:21:54,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:54,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:54,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:54,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083830607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:54,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:54,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:54,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623474790] [2021-05-22 02:21:54,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:54,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:54,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:54,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:54,177 INFO L87 Difference]: Start difference. First operand 118 states and 261 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:54,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:54,479 INFO L93 Difference]: Finished difference Result 196 states and 397 transitions. [2021-05-22 02:21:54,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:21:54,479 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:54,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:54,480 INFO L225 Difference]: With dead ends: 196 [2021-05-22 02:21:54,480 INFO L226 Difference]: Without dead ends: 196 [2021-05-22 02:21:54,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 343.6ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:21:54,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-22 02:21:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 119. [2021-05-22 02:21:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2542372881355934) internal successors, (266), 118 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 266 transitions. [2021-05-22 02:21:54,481 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 266 transitions. Word has length 17 [2021-05-22 02:21:54,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:54,482 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 266 transitions. [2021-05-22 02:21:54,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:54,482 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 266 transitions. [2021-05-22 02:21:54,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:54,482 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:54,482 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:54,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-05-22 02:21:54,683 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:54,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:54,683 INFO L82 PathProgramCache]: Analyzing trace with hash 199159296, now seen corresponding path program 84 times [2021-05-22 02:21:54,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:54,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638865771] [2021-05-22 02:21:54,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:54,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:54,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638865771] [2021-05-22 02:21:54,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638865771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:54,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328653758] [2021-05-22 02:21:54,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:54,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:21:54,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:54,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:54,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:54,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328653758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:54,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:54,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:54,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198490515] [2021-05-22 02:21:54,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:54,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:54,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:54,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:54,931 INFO L87 Difference]: Start difference. First operand 119 states and 266 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:55,100 INFO L93 Difference]: Finished difference Result 140 states and 301 transitions. [2021-05-22 02:21:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:21:55,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:55,100 INFO L225 Difference]: With dead ends: 140 [2021-05-22 02:21:55,100 INFO L226 Difference]: Without dead ends: 134 [2021-05-22 02:21:55,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:21:55,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-22 02:21:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2021-05-22 02:21:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2457627118644066) internal successors, (265), 118 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 265 transitions. [2021-05-22 02:21:55,102 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 265 transitions. Word has length 17 [2021-05-22 02:21:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:55,102 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 265 transitions. [2021-05-22 02:21:55,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:55,102 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 265 transitions. [2021-05-22 02:21:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:55,103 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:55,103 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:55,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-05-22 02:21:55,318 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:55,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:55,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1833782395, now seen corresponding path program 85 times [2021-05-22 02:21:55,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:55,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760831064] [2021-05-22 02:21:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:55,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:55,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760831064] [2021-05-22 02:21:55,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760831064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:55,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158367798] [2021-05-22 02:21:55,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:55,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:55,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:55,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158367798] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:55,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:55,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:55,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604733477] [2021-05-22 02:21:55,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:55,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:55,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:55,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:55,536 INFO L87 Difference]: Start difference. First operand 119 states and 265 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:55,737 INFO L93 Difference]: Finished difference Result 150 states and 322 transitions. [2021-05-22 02:21:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:21:55,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:55,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:55,738 INFO L225 Difference]: With dead ends: 150 [2021-05-22 02:21:55,738 INFO L226 Difference]: Without dead ends: 150 [2021-05-22 02:21:55,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:21:55,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-22 02:21:55,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 116. [2021-05-22 02:21:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.226086956521739) internal successors, (256), 115 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:55,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 256 transitions. [2021-05-22 02:21:55,739 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 256 transitions. Word has length 17 [2021-05-22 02:21:55,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:55,740 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 256 transitions. [2021-05-22 02:21:55,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:55,740 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 256 transitions. [2021-05-22 02:21:55,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:55,740 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:55,740 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:55,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-05-22 02:21:55,940 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:55,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:55,941 INFO L82 PathProgramCache]: Analyzing trace with hash -111496436, now seen corresponding path program 86 times [2021-05-22 02:21:55,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:55,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974788424] [2021-05-22 02:21:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:56,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:56,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:56,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974788424] [2021-05-22 02:21:56,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974788424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:56,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299353899] [2021-05-22 02:21:56,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:56,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:21:56,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:56,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:21:56,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:56,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299353899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:56,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:56,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-22 02:21:56,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281984796] [2021-05-22 02:21:56,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:21:56,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:56,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:21:56,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:21:56,207 INFO L87 Difference]: Start difference. First operand 116 states and 256 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:56,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:56,465 INFO L93 Difference]: Finished difference Result 136 states and 296 transitions. [2021-05-22 02:21:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:21:56,465 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:56,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:56,466 INFO L225 Difference]: With dead ends: 136 [2021-05-22 02:21:56,466 INFO L226 Difference]: Without dead ends: 136 [2021-05-22 02:21:56,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 349.5ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:21:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-22 02:21:56,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 116. [2021-05-22 02:21:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.226086956521739) internal successors, (256), 115 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:56,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 256 transitions. [2021-05-22 02:21:56,467 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 256 transitions. Word has length 17 [2021-05-22 02:21:56,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:56,467 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 256 transitions. [2021-05-22 02:21:56,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 256 transitions. [2021-05-22 02:21:56,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:56,468 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:56,468 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:56,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-05-22 02:21:56,668 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:56,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:56,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1182491900, now seen corresponding path program 87 times [2021-05-22 02:21:56,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:56,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711391819] [2021-05-22 02:21:56,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:56,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:56,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711391819] [2021-05-22 02:21:56,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711391819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:56,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263720453] [2021-05-22 02:21:56,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:56,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:21:56,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:56,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:21:56,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:56,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263720453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:56,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:56,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:56,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551602542] [2021-05-22 02:21:56,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:56,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:56,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:56,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:56,988 INFO L87 Difference]: Start difference. First operand 116 states and 256 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:57,291 INFO L93 Difference]: Finished difference Result 142 states and 308 transitions. [2021-05-22 02:21:57,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:21:57,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:57,292 INFO L225 Difference]: With dead ends: 142 [2021-05-22 02:21:57,292 INFO L226 Difference]: Without dead ends: 142 [2021-05-22 02:21:57,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:21:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-22 02:21:57,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 117. [2021-05-22 02:21:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.2327586206896552) internal successors, (259), 116 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 259 transitions. [2021-05-22 02:21:57,294 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 259 transitions. Word has length 17 [2021-05-22 02:21:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:57,294 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 259 transitions. [2021-05-22 02:21:57,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 259 transitions. [2021-05-22 02:21:57,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:57,294 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:57,294 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:57,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-05-22 02:21:57,495 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:57,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:57,495 INFO L82 PathProgramCache]: Analyzing trace with hash 984390345, now seen corresponding path program 88 times [2021-05-22 02:21:57,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:57,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546907292] [2021-05-22 02:21:57,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:57,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:57,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546907292] [2021-05-22 02:21:57,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546907292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:57,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548829607] [2021-05-22 02:21:57,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:57,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:21:57,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:57,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:57,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:57,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548829607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:57,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:57,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:57,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570517980] [2021-05-22 02:21:57,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:57,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:57,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:57,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:57,752 INFO L87 Difference]: Start difference. First operand 117 states and 259 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:57,936 INFO L93 Difference]: Finished difference Result 160 states and 328 transitions. [2021-05-22 02:21:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:21:57,944 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:57,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:57,944 INFO L225 Difference]: With dead ends: 160 [2021-05-22 02:21:57,944 INFO L226 Difference]: Without dead ends: 156 [2021-05-22 02:21:57,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:21:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-22 02:21:57,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 123. [2021-05-22 02:21:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.2295081967213113) internal successors, (272), 122 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 272 transitions. [2021-05-22 02:21:57,946 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 272 transitions. Word has length 17 [2021-05-22 02:21:57,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:57,946 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 272 transitions. [2021-05-22 02:21:57,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:57,946 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 272 transitions. [2021-05-22 02:21:57,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:57,947 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:57,947 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:58,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:58,149 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:58,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:58,149 INFO L82 PathProgramCache]: Analyzing trace with hash 741639945, now seen corresponding path program 89 times [2021-05-22 02:21:58,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:58,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123827573] [2021-05-22 02:21:58,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:58,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:58,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123827573] [2021-05-22 02:21:58,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123827573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:58,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245300410] [2021-05-22 02:21:58,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:58,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:21:58,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:58,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:58,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:58,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245300410] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:58,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:58,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:58,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839160912] [2021-05-22 02:21:58,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:58,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:58,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:58,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:58,443 INFO L87 Difference]: Start difference. First operand 123 states and 272 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:58,539 INFO L93 Difference]: Finished difference Result 134 states and 291 transitions. [2021-05-22 02:21:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:21:58,540 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:58,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:58,540 INFO L225 Difference]: With dead ends: 134 [2021-05-22 02:21:58,540 INFO L226 Difference]: Without dead ends: 134 [2021-05-22 02:21:58,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 236.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:21:58,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-22 02:21:58,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2021-05-22 02:21:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.2280701754385963) internal successors, (254), 114 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-05-22 02:21:58,542 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-05-22 02:21:58,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:58,542 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-05-22 02:21:58,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-05-22 02:21:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:58,542 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:58,542 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:58,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:58,758 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:58,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:58,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1629340458, now seen corresponding path program 90 times [2021-05-22 02:21:58,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:58,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964713490] [2021-05-22 02:21:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:58,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:58,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964713490] [2021-05-22 02:21:58,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964713490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:58,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409610859] [2021-05-22 02:21:58,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:58,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:21:58,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:21:58,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:58,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:59,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409610859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:59,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:59,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:59,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201179375] [2021-05-22 02:21:59,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:59,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:59,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:59,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:59,019 INFO L87 Difference]: Start difference. First operand 115 states and 254 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:59,128 INFO L93 Difference]: Finished difference Result 134 states and 292 transitions. [2021-05-22 02:21:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:21:59,128 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:59,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:59,128 INFO L225 Difference]: With dead ends: 134 [2021-05-22 02:21:59,128 INFO L226 Difference]: Without dead ends: 134 [2021-05-22 02:21:59,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:21:59,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-22 02:21:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 115. [2021-05-22 02:21:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.2280701754385963) internal successors, (254), 114 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 254 transitions. [2021-05-22 02:21:59,130 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 254 transitions. Word has length 17 [2021-05-22 02:21:59,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:59,130 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 254 transitions. [2021-05-22 02:21:59,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 254 transitions. [2021-05-22 02:21:59,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:59,130 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:59,130 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:21:59,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:59,347 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:21:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:21:59,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1868891086, now seen corresponding path program 91 times [2021-05-22 02:21:59,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:21:59,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831722738] [2021-05-22 02:21:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:21:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:59,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:21:59,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831722738] [2021-05-22 02:21:59,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831722738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:59,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628233599] [2021-05-22 02:21:59,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:21:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:21:59,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:21:59,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:21:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:21:59,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628233599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:21:59,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:21:59,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:21:59,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497959199] [2021-05-22 02:21:59,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:21:59,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:21:59,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:21:59,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:21:59,621 INFO L87 Difference]: Start difference. First operand 115 states and 254 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:21:59,833 INFO L93 Difference]: Finished difference Result 148 states and 315 transitions. [2021-05-22 02:21:59,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:21:59,833 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:21:59,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:21:59,834 INFO L225 Difference]: With dead ends: 148 [2021-05-22 02:21:59,834 INFO L226 Difference]: Without dead ends: 145 [2021-05-22 02:21:59,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 286.1ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:21:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-22 02:21:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 115. [2021-05-22 02:21:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.219298245614035) internal successors, (253), 114 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:59,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 253 transitions. [2021-05-22 02:21:59,835 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 253 transitions. Word has length 17 [2021-05-22 02:21:59,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:21:59,835 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 253 transitions. [2021-05-22 02:21:59,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:21:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 253 transitions. [2021-05-22 02:21:59,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:21:59,836 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:21:59,836 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:00,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-05-22 02:22:00,036 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:00,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:00,036 INFO L82 PathProgramCache]: Analyzing trace with hash -741494993, now seen corresponding path program 92 times [2021-05-22 02:22:00,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:00,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058728895] [2021-05-22 02:22:00,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:00,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:00,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058728895] [2021-05-22 02:22:00,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058728895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:00,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260040545] [2021-05-22 02:22:00,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:00,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:22:00,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:00,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:00,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:00,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260040545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:00,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:00,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:00,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016116223] [2021-05-22 02:22:00,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:00,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:00,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:00,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:00,324 INFO L87 Difference]: Start difference. First operand 115 states and 253 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:00,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:00,455 INFO L93 Difference]: Finished difference Result 133 states and 285 transitions. [2021-05-22 02:22:00,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:22:00,455 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:00,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:00,456 INFO L225 Difference]: With dead ends: 133 [2021-05-22 02:22:00,456 INFO L226 Difference]: Without dead ends: 131 [2021-05-22 02:22:00,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 284.5ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:22:00,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-22 02:22:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2021-05-22 02:22:00,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.2142857142857144) internal successors, (248), 112 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 248 transitions. [2021-05-22 02:22:00,457 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 248 transitions. Word has length 17 [2021-05-22 02:22:00,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:00,457 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 248 transitions. [2021-05-22 02:22:00,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:00,458 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 248 transitions. [2021-05-22 02:22:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:00,458 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:00,458 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:00,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:00,658 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:00,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:00,659 INFO L82 PathProgramCache]: Analyzing trace with hash -235148727, now seen corresponding path program 93 times [2021-05-22 02:22:00,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:00,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984427918] [2021-05-22 02:22:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:00,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:00,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984427918] [2021-05-22 02:22:00,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984427918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:00,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880517392] [2021-05-22 02:22:00,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:00,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:22:00,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:00,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:00,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:00,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880517392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:00,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:00,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:00,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285800134] [2021-05-22 02:22:00,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:00,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:00,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:00,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:00,885 INFO L87 Difference]: Start difference. First operand 113 states and 248 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:01,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:01,086 INFO L93 Difference]: Finished difference Result 184 states and 371 transitions. [2021-05-22 02:22:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:22:01,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:01,087 INFO L225 Difference]: With dead ends: 184 [2021-05-22 02:22:01,087 INFO L226 Difference]: Without dead ends: 184 [2021-05-22 02:22:01,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:22:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-22 02:22:01,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 115. [2021-05-22 02:22:01,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.236842105263158) internal successors, (255), 114 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 255 transitions. [2021-05-22 02:22:01,088 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 255 transitions. Word has length 17 [2021-05-22 02:22:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:01,088 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 255 transitions. [2021-05-22 02:22:01,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:01,089 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 255 transitions. [2021-05-22 02:22:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:01,089 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:01,089 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:01,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-05-22 02:22:01,304 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1259937386, now seen corresponding path program 94 times [2021-05-22 02:22:01,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:01,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721827643] [2021-05-22 02:22:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:01,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:01,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721827643] [2021-05-22 02:22:01,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721827643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:01,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4307275] [2021-05-22 02:22:01,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:01,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:22:01,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:01,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:01,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:01,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4307275] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:01,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:01,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:01,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135723361] [2021-05-22 02:22:01,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:01,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:01,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:01,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:01,555 INFO L87 Difference]: Start difference. First operand 115 states and 255 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:01,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:01,705 INFO L93 Difference]: Finished difference Result 144 states and 298 transitions. [2021-05-22 02:22:01,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:22:01,705 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:01,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:01,706 INFO L225 Difference]: With dead ends: 144 [2021-05-22 02:22:01,706 INFO L226 Difference]: Without dead ends: 138 [2021-05-22 02:22:01,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:22:01,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-22 02:22:01,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2021-05-22 02:22:01,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.2) internal successors, (264), 120 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 264 transitions. [2021-05-22 02:22:01,707 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 264 transitions. Word has length 17 [2021-05-22 02:22:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:01,707 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 264 transitions. [2021-05-22 02:22:01,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 264 transitions. [2021-05-22 02:22:01,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:01,708 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:01,708 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:01,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:01,908 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:01,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:01,908 INFO L82 PathProgramCache]: Analyzing trace with hash -773004305, now seen corresponding path program 95 times [2021-05-22 02:22:01,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:01,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532032016] [2021-05-22 02:22:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:02,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:02,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532032016] [2021-05-22 02:22:02,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532032016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:02,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461510900] [2021-05-22 02:22:02,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:02,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:22:02,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:02,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:02,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:02,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461510900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:02,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:02,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:02,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409291424] [2021-05-22 02:22:02,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:02,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:02,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:02,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:02,155 INFO L87 Difference]: Start difference. First operand 121 states and 264 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:02,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:02,285 INFO L93 Difference]: Finished difference Result 142 states and 303 transitions. [2021-05-22 02:22:02,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:22:02,285 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:02,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:02,285 INFO L225 Difference]: With dead ends: 142 [2021-05-22 02:22:02,285 INFO L226 Difference]: Without dead ends: 142 [2021-05-22 02:22:02,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:22:02,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-22 02:22:02,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 119. [2021-05-22 02:22:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 118 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-05-22 02:22:02,287 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 17 [2021-05-22 02:22:02,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:02,287 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-05-22 02:22:02,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:02,287 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-05-22 02:22:02,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:02,287 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:02,288 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:02,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-05-22 02:22:02,488 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:02,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:02,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1398169660, now seen corresponding path program 96 times [2021-05-22 02:22:02,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:02,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829753812] [2021-05-22 02:22:02,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:02,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:02,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829753812] [2021-05-22 02:22:02,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829753812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:02,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957381014] [2021-05-22 02:22:02,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:02,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:22:02,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:02,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:02,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:02,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:02,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957381014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:02,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:02,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:02,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211824458] [2021-05-22 02:22:02,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:02,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:02,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:02,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:02,736 INFO L87 Difference]: Start difference. First operand 119 states and 257 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:02,826 INFO L93 Difference]: Finished difference Result 138 states and 295 transitions. [2021-05-22 02:22:02,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:22:02,827 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:02,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:02,827 INFO L225 Difference]: With dead ends: 138 [2021-05-22 02:22:02,827 INFO L226 Difference]: Without dead ends: 138 [2021-05-22 02:22:02,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:02,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-22 02:22:02,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2021-05-22 02:22:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 118 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:02,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-05-22 02:22:02,829 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 17 [2021-05-22 02:22:02,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:02,829 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-05-22 02:22:02,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:02,829 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-05-22 02:22:02,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:02,829 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:02,829 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:03,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-05-22 02:22:03,037 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:03,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:03,037 INFO L82 PathProgramCache]: Analyzing trace with hash -601433908, now seen corresponding path program 97 times [2021-05-22 02:22:03,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:03,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713059082] [2021-05-22 02:22:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:03,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:03,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713059082] [2021-05-22 02:22:03,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713059082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:03,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614803623] [2021-05-22 02:22:03,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:03,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:03,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:03,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614803623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:03,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:03,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:03,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830325193] [2021-05-22 02:22:03,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:03,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:03,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:03,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:03,272 INFO L87 Difference]: Start difference. First operand 119 states and 257 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:03,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:03,380 INFO L93 Difference]: Finished difference Result 148 states and 315 transitions. [2021-05-22 02:22:03,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:22:03,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:03,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:03,381 INFO L225 Difference]: With dead ends: 148 [2021-05-22 02:22:03,381 INFO L226 Difference]: Without dead ends: 148 [2021-05-22 02:22:03,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:03,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-22 02:22:03,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2021-05-22 02:22:03,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1779661016949152) internal successors, (257), 118 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:03,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 257 transitions. [2021-05-22 02:22:03,383 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 257 transitions. Word has length 17 [2021-05-22 02:22:03,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:03,383 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 257 transitions. [2021-05-22 02:22:03,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:03,383 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 257 transitions. [2021-05-22 02:22:03,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:03,383 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:03,383 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:03,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:03,600 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:03,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:03,600 INFO L82 PathProgramCache]: Analyzing trace with hash -313883673, now seen corresponding path program 98 times [2021-05-22 02:22:03,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:03,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436319719] [2021-05-22 02:22:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:03,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:03,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436319719] [2021-05-22 02:22:03,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436319719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:03,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620218648] [2021-05-22 02:22:03,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:03,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:22:03,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:22:03,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:03,937 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-05-22 02:22:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:03,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620218648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:03,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:03,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:03,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109391770] [2021-05-22 02:22:03,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:03,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:03,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:03,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:03,982 INFO L87 Difference]: Start difference. First operand 119 states and 257 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:04,140 INFO L93 Difference]: Finished difference Result 134 states and 282 transitions. [2021-05-22 02:22:04,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:22:04,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:04,141 INFO L225 Difference]: With dead ends: 134 [2021-05-22 02:22:04,141 INFO L226 Difference]: Without dead ends: 134 [2021-05-22 02:22:04,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 371.7ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:22:04,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-22 02:22:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 112. [2021-05-22 02:22:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-05-22 02:22:04,143 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 17 [2021-05-22 02:22:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:04,143 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-05-22 02:22:04,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-05-22 02:22:04,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:04,143 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:04,143 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:04,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:04,344 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:04,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:04,344 INFO L82 PathProgramCache]: Analyzing trace with hash -302282879, now seen corresponding path program 99 times [2021-05-22 02:22:04,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:04,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844126380] [2021-05-22 02:22:04,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:04,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:04,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844126380] [2021-05-22 02:22:04,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844126380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:04,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347857862] [2021-05-22 02:22:04,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:04,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:22:04,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:04,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:04,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:04,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347857862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:04,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:04,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:04,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708848925] [2021-05-22 02:22:04,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:04,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:04,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:04,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:04,603 INFO L87 Difference]: Start difference. First operand 112 states and 236 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:04,861 INFO L93 Difference]: Finished difference Result 150 states and 305 transitions. [2021-05-22 02:22:04,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:22:04,862 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:04,862 INFO L225 Difference]: With dead ends: 150 [2021-05-22 02:22:04,862 INFO L226 Difference]: Without dead ends: 148 [2021-05-22 02:22:04,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 332.7ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:22:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-22 02:22:04,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 118. [2021-05-22 02:22:04,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1367521367521367) internal successors, (250), 117 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:04,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 250 transitions. [2021-05-22 02:22:04,863 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 250 transitions. Word has length 17 [2021-05-22 02:22:04,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:04,864 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 250 transitions. [2021-05-22 02:22:04,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:04,864 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 250 transitions. [2021-05-22 02:22:04,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:04,864 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:04,864 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:05,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-05-22 02:22:05,064 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:05,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:05,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1032308451, now seen corresponding path program 100 times [2021-05-22 02:22:05,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:05,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785982245] [2021-05-22 02:22:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:05,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:05,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785982245] [2021-05-22 02:22:05,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785982245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:05,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128395462] [2021-05-22 02:22:05,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:05,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:22:05,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:05,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:05,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:05,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:05,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128395462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:05,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:05,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:05,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648539729] [2021-05-22 02:22:05,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:05,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:05,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:05,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:05,286 INFO L87 Difference]: Start difference. First operand 118 states and 250 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:05,546 INFO L93 Difference]: Finished difference Result 156 states and 319 transitions. [2021-05-22 02:22:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:22:05,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:05,547 INFO L225 Difference]: With dead ends: 156 [2021-05-22 02:22:05,547 INFO L226 Difference]: Without dead ends: 156 [2021-05-22 02:22:05,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 314.8ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:22:05,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-22 02:22:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2021-05-22 02:22:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1379310344827585) internal successors, (248), 116 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 248 transitions. [2021-05-22 02:22:05,548 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 248 transitions. Word has length 17 [2021-05-22 02:22:05,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:05,548 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 248 transitions. [2021-05-22 02:22:05,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:05,548 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 248 transitions. [2021-05-22 02:22:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:05,549 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:05,549 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:05,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:05,749 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:05,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:05,749 INFO L82 PathProgramCache]: Analyzing trace with hash 494452873, now seen corresponding path program 101 times [2021-05-22 02:22:05,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:05,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558767897] [2021-05-22 02:22:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:05,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:05,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558767897] [2021-05-22 02:22:05,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558767897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:05,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958600645] [2021-05-22 02:22:05,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:05,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:22:05,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:05,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:05,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:05,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:05,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958600645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:05,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:05,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:05,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202540407] [2021-05-22 02:22:05,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:05,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:05,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:05,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:05,972 INFO L87 Difference]: Start difference. First operand 117 states and 248 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:06,125 INFO L93 Difference]: Finished difference Result 136 states and 284 transitions. [2021-05-22 02:22:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:22:06,125 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:06,126 INFO L225 Difference]: With dead ends: 136 [2021-05-22 02:22:06,126 INFO L226 Difference]: Without dead ends: 136 [2021-05-22 02:22:06,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:22:06,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-22 02:22:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 111. [2021-05-22 02:22:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1272727272727274) internal successors, (234), 110 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 234 transitions. [2021-05-22 02:22:06,127 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 234 transitions. Word has length 17 [2021-05-22 02:22:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:06,127 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 234 transitions. [2021-05-22 02:22:06,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 234 transitions. [2021-05-22 02:22:06,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:06,127 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:06,127 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:06,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-05-22 02:22:06,329 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:06,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:06,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1578222580, now seen corresponding path program 102 times [2021-05-22 02:22:06,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:06,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382948960] [2021-05-22 02:22:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:06,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:06,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382948960] [2021-05-22 02:22:06,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382948960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:06,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35267423] [2021-05-22 02:22:06,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:06,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:22:06,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:06,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:06,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:06,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35267423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:06,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:06,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:06,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978887248] [2021-05-22 02:22:06,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:06,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:06,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:06,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:06,581 INFO L87 Difference]: Start difference. First operand 111 states and 234 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:06,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:06,680 INFO L93 Difference]: Finished difference Result 127 states and 266 transitions. [2021-05-22 02:22:06,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:22:06,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:06,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:06,680 INFO L225 Difference]: With dead ends: 127 [2021-05-22 02:22:06,680 INFO L226 Difference]: Without dead ends: 127 [2021-05-22 02:22:06,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:22:06,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-22 02:22:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 114. [2021-05-22 02:22:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1238938053097347) internal successors, (240), 113 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 240 transitions. [2021-05-22 02:22:06,682 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 240 transitions. Word has length 17 [2021-05-22 02:22:06,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:06,682 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 240 transitions. [2021-05-22 02:22:06,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:06,682 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 240 transitions. [2021-05-22 02:22:06,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:06,682 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:06,682 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:06,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:06,883 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:06,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:06,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1290672345, now seen corresponding path program 103 times [2021-05-22 02:22:06,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:06,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692490556] [2021-05-22 02:22:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:06,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:06,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692490556] [2021-05-22 02:22:06,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692490556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:06,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919284369] [2021-05-22 02:22:06,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:06,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:06,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:07,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919284369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:07,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:07,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:07,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836143698] [2021-05-22 02:22:07,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:07,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:07,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:07,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:07,093 INFO L87 Difference]: Start difference. First operand 114 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:07,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:07,386 INFO L93 Difference]: Finished difference Result 157 states and 322 transitions. [2021-05-22 02:22:07,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:22:07,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:07,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:07,387 INFO L225 Difference]: With dead ends: 157 [2021-05-22 02:22:07,387 INFO L226 Difference]: Without dead ends: 157 [2021-05-22 02:22:07,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:22:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-22 02:22:07,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2021-05-22 02:22:07,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1452991452991452) internal successors, (251), 117 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:07,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 251 transitions. [2021-05-22 02:22:07,388 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 251 transitions. Word has length 17 [2021-05-22 02:22:07,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:07,388 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 251 transitions. [2021-05-22 02:22:07,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 251 transitions. [2021-05-22 02:22:07,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:07,389 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:07,389 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:07,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable633 [2021-05-22 02:22:07,589 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:07,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:07,589 INFO L82 PathProgramCache]: Analyzing trace with hash -988682065, now seen corresponding path program 104 times [2021-05-22 02:22:07,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:07,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274719478] [2021-05-22 02:22:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:07,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:07,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274719478] [2021-05-22 02:22:07,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274719478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:07,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450397333] [2021-05-22 02:22:07,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:07,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:22:07,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:07,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:07,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:07,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450397333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:07,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:07,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:07,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877353779] [2021-05-22 02:22:07,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:07,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:07,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:07,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:07,829 INFO L87 Difference]: Start difference. First operand 118 states and 251 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:08,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:08,088 INFO L93 Difference]: Finished difference Result 145 states and 303 transitions. [2021-05-22 02:22:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:22:08,088 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:08,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:08,089 INFO L225 Difference]: With dead ends: 145 [2021-05-22 02:22:08,089 INFO L226 Difference]: Without dead ends: 145 [2021-05-22 02:22:08,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 318.3ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:22:08,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-22 02:22:08,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 117. [2021-05-22 02:22:08,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-05-22 02:22:08,090 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-05-22 02:22:08,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:08,090 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-05-22 02:22:08,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:08,090 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-05-22 02:22:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:08,091 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:08,091 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:08,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable638 [2021-05-22 02:22:08,291 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:08,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:08,291 INFO L82 PathProgramCache]: Analyzing trace with hash -482335799, now seen corresponding path program 105 times [2021-05-22 02:22:08,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:08,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549885227] [2021-05-22 02:22:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:08,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:08,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549885227] [2021-05-22 02:22:08,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549885227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:08,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027383424] [2021-05-22 02:22:08,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:08,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:22:08,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:08,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:08,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:08,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027383424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:08,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:08,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-22 02:22:08,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059481000] [2021-05-22 02:22:08,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:22:08,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:08,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:22:08,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:22:08,511 INFO L87 Difference]: Start difference. First operand 117 states and 249 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:08,692 INFO L93 Difference]: Finished difference Result 137 states and 286 transitions. [2021-05-22 02:22:08,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:22:08,693 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:08,693 INFO L225 Difference]: With dead ends: 137 [2021-05-22 02:22:08,693 INFO L226 Difference]: Without dead ends: 137 [2021-05-22 02:22:08,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:22:08,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-22 02:22:08,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 113. [2021-05-22 02:22:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1339285714285716) internal successors, (239), 112 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 239 transitions. [2021-05-22 02:22:08,695 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 239 transitions. Word has length 17 [2021-05-22 02:22:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:08,695 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 239 transitions. [2021-05-22 02:22:08,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:08,695 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 239 transitions. [2021-05-22 02:22:08,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:08,695 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:08,695 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:08,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-05-22 02:22:08,905 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:08,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:08,905 INFO L82 PathProgramCache]: Analyzing trace with hash 425996420, now seen corresponding path program 106 times [2021-05-22 02:22:08,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:08,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920302634] [2021-05-22 02:22:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:08,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:08,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920302634] [2021-05-22 02:22:08,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920302634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:08,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25180906] [2021-05-22 02:22:08,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:08,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:22:08,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:08,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:08,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:09,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25180906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:09,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:09,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-22 02:22:09,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050916168] [2021-05-22 02:22:09,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:22:09,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:09,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:22:09,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:22:09,091 INFO L87 Difference]: Start difference. First operand 113 states and 239 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:09,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:09,213 INFO L93 Difference]: Finished difference Result 124 states and 260 transitions. [2021-05-22 02:22:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:22:09,213 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:09,213 INFO L225 Difference]: With dead ends: 124 [2021-05-22 02:22:09,213 INFO L226 Difference]: Without dead ends: 124 [2021-05-22 02:22:09,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:22:09,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-22 02:22:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2021-05-22 02:22:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1339285714285716) internal successors, (239), 112 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:09,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 239 transitions. [2021-05-22 02:22:09,215 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 239 transitions. Word has length 17 [2021-05-22 02:22:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:09,215 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 239 transitions. [2021-05-22 02:22:09,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 239 transitions. [2021-05-22 02:22:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:09,215 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:09,215 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:09,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable644,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:09,431 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:09,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:09,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1120130721, now seen corresponding path program 107 times [2021-05-22 02:22:09,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:09,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39209465] [2021-05-22 02:22:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:09,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:09,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39209465] [2021-05-22 02:22:09,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39209465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:09,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998516047] [2021-05-22 02:22:09,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:09,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:22:09,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:09,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:09,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:09,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998516047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:09,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:09,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-22 02:22:09,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705869160] [2021-05-22 02:22:09,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:22:09,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:09,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:22:09,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:22:09,702 INFO L87 Difference]: Start difference. First operand 113 states and 239 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:09,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:09,906 INFO L93 Difference]: Finished difference Result 119 states and 246 transitions. [2021-05-22 02:22:09,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:22:09,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:09,906 INFO L225 Difference]: With dead ends: 119 [2021-05-22 02:22:09,906 INFO L226 Difference]: Without dead ends: 113 [2021-05-22 02:22:09,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:22:09,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-22 02:22:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-05-22 02:22:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-05-22 02:22:09,908 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 17 [2021-05-22 02:22:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:09,908 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-05-22 02:22:09,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-05-22 02:22:09,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:09,908 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:09,908 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:10,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:10,109 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:10,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:10,109 INFO L82 PathProgramCache]: Analyzing trace with hash -644999044, now seen corresponding path program 108 times [2021-05-22 02:22:10,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:10,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486973404] [2021-05-22 02:22:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:10,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:10,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486973404] [2021-05-22 02:22:10,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486973404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:10,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750717317] [2021-05-22 02:22:10,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:10,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:22:10,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:10,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:10,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:10,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750717317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:10,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:10,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:10,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89660327] [2021-05-22 02:22:10,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:10,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:10,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:10,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:10,355 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:10,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:10,608 INFO L93 Difference]: Finished difference Result 133 states and 277 transitions. [2021-05-22 02:22:10,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:22:10,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:10,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:10,615 INFO L225 Difference]: With dead ends: 133 [2021-05-22 02:22:10,615 INFO L226 Difference]: Without dead ends: 133 [2021-05-22 02:22:10,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 310.0ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:22:10,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-22 02:22:10,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 113. [2021-05-22 02:22:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-05-22 02:22:10,617 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 17 [2021-05-22 02:22:10,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:10,617 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-05-22 02:22:10,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:10,617 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-05-22 02:22:10,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:10,617 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:10,617 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:10,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-05-22 02:22:10,818 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:10,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:10,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1521883201, now seen corresponding path program 109 times [2021-05-22 02:22:10,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:10,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290114257] [2021-05-22 02:22:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:10,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:10,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290114257] [2021-05-22 02:22:10,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290114257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:10,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192406347] [2021-05-22 02:22:10,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:10,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:10,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:11,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192406347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:11,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:11,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:11,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843476990] [2021-05-22 02:22:11,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:11,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:11,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:11,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:11,070 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:11,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:11,232 INFO L93 Difference]: Finished difference Result 151 states and 297 transitions. [2021-05-22 02:22:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:22:11,232 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:11,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:11,233 INFO L225 Difference]: With dead ends: 151 [2021-05-22 02:22:11,233 INFO L226 Difference]: Without dead ends: 147 [2021-05-22 02:22:11,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 280.6ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:22:11,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-22 02:22:11,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 119. [2021-05-22 02:22:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1271186440677967) internal successors, (251), 118 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 251 transitions. [2021-05-22 02:22:11,234 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 251 transitions. Word has length 17 [2021-05-22 02:22:11,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:11,234 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 251 transitions. [2021-05-22 02:22:11,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:11,234 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 251 transitions. [2021-05-22 02:22:11,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:11,234 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:11,234 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:11,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-05-22 02:22:11,435 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:11,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:11,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1279132801, now seen corresponding path program 110 times [2021-05-22 02:22:11,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:11,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567092564] [2021-05-22 02:22:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:11,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:11,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567092564] [2021-05-22 02:22:11,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567092564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:11,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882586551] [2021-05-22 02:22:11,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:11,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:22:11,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:11,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-22 02:22:11,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:11,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882586551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:11,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:11,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:11,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889660821] [2021-05-22 02:22:11,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:11,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:11,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:11,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:11,711 INFO L87 Difference]: Start difference. First operand 119 states and 251 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:11,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:11,825 INFO L93 Difference]: Finished difference Result 125 states and 260 transitions. [2021-05-22 02:22:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:22:11,825 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:11,826 INFO L225 Difference]: With dead ends: 125 [2021-05-22 02:22:11,826 INFO L226 Difference]: Without dead ends: 125 [2021-05-22 02:22:11,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:22:11,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-22 02:22:11,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2021-05-22 02:22:11,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:11,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-05-22 02:22:11,827 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 17 [2021-05-22 02:22:11,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:11,827 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-05-22 02:22:11,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:11,827 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-05-22 02:22:11,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:11,827 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:11,827 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:12,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:12,028 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:12,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2128133982, now seen corresponding path program 111 times [2021-05-22 02:22:12,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:12,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989024210] [2021-05-22 02:22:12,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:12,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:12,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989024210] [2021-05-22 02:22:12,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989024210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:12,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856049213] [2021-05-22 02:22:12,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:12,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:22:12,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:12,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:12,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:12,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856049213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:12,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:12,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:12,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110768542] [2021-05-22 02:22:12,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:12,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:12,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:12,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:12,252 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:12,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:12,388 INFO L93 Difference]: Finished difference Result 125 states and 261 transitions. [2021-05-22 02:22:12,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:22:12,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:12,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:12,389 INFO L225 Difference]: With dead ends: 125 [2021-05-22 02:22:12,389 INFO L226 Difference]: Without dead ends: 125 [2021-05-22 02:22:12,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:22:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-22 02:22:12,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2021-05-22 02:22:12,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-05-22 02:22:12,390 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 17 [2021-05-22 02:22:12,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:12,390 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-05-22 02:22:12,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:12,390 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-05-22 02:22:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:12,390 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:12,390 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:12,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-05-22 02:22:12,591 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:12,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:12,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1331398230, now seen corresponding path program 112 times [2021-05-22 02:22:12,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:12,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390368092] [2021-05-22 02:22:12,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:12,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:12,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390368092] [2021-05-22 02:22:12,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390368092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:12,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088584527] [2021-05-22 02:22:12,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:12,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:22:12,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:12,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:12,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:12,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088584527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:12,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:12,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:12,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583358291] [2021-05-22 02:22:12,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:12,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:12,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:12,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:12,798 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:12,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:12,982 INFO L93 Difference]: Finished difference Result 134 states and 279 transitions. [2021-05-22 02:22:12,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:22:12,982 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:12,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:12,983 INFO L225 Difference]: With dead ends: 134 [2021-05-22 02:22:12,983 INFO L226 Difference]: Without dead ends: 134 [2021-05-22 02:22:12,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:22:12,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-22 02:22:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2021-05-22 02:22:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:12,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-05-22 02:22:12,984 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 17 [2021-05-22 02:22:12,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:12,984 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-05-22 02:22:12,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-05-22 02:22:12,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:12,984 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:12,985 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:13,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:13,185 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:13,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:13,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1043847995, now seen corresponding path program 113 times [2021-05-22 02:22:13,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:13,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838003799] [2021-05-22 02:22:13,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:13,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:13,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838003799] [2021-05-22 02:22:13,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838003799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:13,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854193214] [2021-05-22 02:22:13,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:13,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:22:13,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:13,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:13,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:13,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854193214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:13,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:13,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:13,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60185480] [2021-05-22 02:22:13,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:13,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:13,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:13,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:13,506 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:13,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:13,649 INFO L93 Difference]: Finished difference Result 121 states and 251 transitions. [2021-05-22 02:22:13,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:22:13,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:13,650 INFO L225 Difference]: With dead ends: 121 [2021-05-22 02:22:13,650 INFO L226 Difference]: Without dead ends: 121 [2021-05-22 02:22:13,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 298.8ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:22:13,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-22 02:22:13,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 108. [2021-05-22 02:22:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.1121495327102804) internal successors, (226), 107 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:13,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 226 transitions. [2021-05-22 02:22:13,651 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 226 transitions. Word has length 17 [2021-05-22 02:22:13,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:13,651 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 226 transitions. [2021-05-22 02:22:13,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:13,652 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 226 transitions. [2021-05-22 02:22:13,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:13,652 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:13,652 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:13,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-05-22 02:22:13,852 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:13,853 INFO L82 PathProgramCache]: Analyzing trace with hash 302344129, now seen corresponding path program 114 times [2021-05-22 02:22:13,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:13,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776734588] [2021-05-22 02:22:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:13,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:13,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776734588] [2021-05-22 02:22:13,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776734588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:13,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123809964] [2021-05-22 02:22:13,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:13,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:22:13,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:13,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:13,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:14,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123809964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:14,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:14,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:14,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825164217] [2021-05-22 02:22:14,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:14,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:14,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:14,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:14,063 INFO L87 Difference]: Start difference. First operand 108 states and 226 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:14,230 INFO L93 Difference]: Finished difference Result 172 states and 335 transitions. [2021-05-22 02:22:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:22:14,231 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:14,231 INFO L225 Difference]: With dead ends: 172 [2021-05-22 02:22:14,231 INFO L226 Difference]: Without dead ends: 172 [2021-05-22 02:22:14,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:22:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-22 02:22:14,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 110. [2021-05-22 02:22:14,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-05-22 02:22:14,233 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 17 [2021-05-22 02:22:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:14,233 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-05-22 02:22:14,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-05-22 02:22:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:14,233 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:14,233 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:14,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable680,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:14,434 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:14,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:14,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1797430242, now seen corresponding path program 115 times [2021-05-22 02:22:14,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:14,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656023338] [2021-05-22 02:22:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:14,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:14,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656023338] [2021-05-22 02:22:14,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656023338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:14,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836115759] [2021-05-22 02:22:14,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:14,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:14,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:14,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836115759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:14,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:14,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:14,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173135823] [2021-05-22 02:22:14,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:14,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:14,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:14,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:14,686 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:14,794 INFO L93 Difference]: Finished difference Result 150 states and 297 transitions. [2021-05-22 02:22:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:22:14,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:14,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:14,794 INFO L225 Difference]: With dead ends: 150 [2021-05-22 02:22:14,794 INFO L226 Difference]: Without dead ends: 144 [2021-05-22 02:22:14,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:22:14,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-22 02:22:14,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 115. [2021-05-22 02:22:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.175438596491228) internal successors, (248), 114 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 248 transitions. [2021-05-22 02:22:14,796 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 248 transitions. Word has length 17 [2021-05-22 02:22:14,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:14,796 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 248 transitions. [2021-05-22 02:22:14,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:14,796 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 248 transitions. [2021-05-22 02:22:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:14,796 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:14,796 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:14,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-05-22 02:22:14,997 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:14,997 INFO L82 PathProgramCache]: Analyzing trace with hash -235511449, now seen corresponding path program 116 times [2021-05-22 02:22:14,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:14,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253642793] [2021-05-22 02:22:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:15,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:15,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253642793] [2021-05-22 02:22:15,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253642793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:15,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264637508] [2021-05-22 02:22:15,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:15,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:22:15,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:15,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:15,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:15,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264637508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:15,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:15,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:15,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804257804] [2021-05-22 02:22:15,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:15,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:15,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:15,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:15,268 INFO L87 Difference]: Start difference. First operand 115 states and 248 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:15,367 INFO L93 Difference]: Finished difference Result 129 states and 273 transitions. [2021-05-22 02:22:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:22:15,368 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:15,368 INFO L225 Difference]: With dead ends: 129 [2021-05-22 02:22:15,368 INFO L226 Difference]: Without dead ends: 129 [2021-05-22 02:22:15,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:15,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-22 02:22:15,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2021-05-22 02:22:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-05-22 02:22:15,369 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 17 [2021-05-22 02:22:15,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:15,369 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-05-22 02:22:15,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:15,370 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-05-22 02:22:15,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:15,370 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:15,370 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:15,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:15,585 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:15,585 INFO L82 PathProgramCache]: Analyzing trace with hash -860676804, now seen corresponding path program 117 times [2021-05-22 02:22:15,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:15,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994486107] [2021-05-22 02:22:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:15,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:15,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994486107] [2021-05-22 02:22:15,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994486107] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:15,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730515823] [2021-05-22 02:22:15,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:15,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:22:15,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:15,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:15,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:15,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730515823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:15,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:15,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:15,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819940528] [2021-05-22 02:22:15,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:15,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:15,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:15,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:15,826 INFO L87 Difference]: Start difference. First operand 113 states and 241 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:15,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:15,976 INFO L93 Difference]: Finished difference Result 127 states and 269 transitions. [2021-05-22 02:22:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:22:15,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:15,976 INFO L225 Difference]: With dead ends: 127 [2021-05-22 02:22:15,977 INFO L226 Difference]: Without dead ends: 127 [2021-05-22 02:22:15,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:22:15,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-22 02:22:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 113. [2021-05-22 02:22:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:15,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-05-22 02:22:15,978 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 17 [2021-05-22 02:22:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:15,978 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-05-22 02:22:15,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-05-22 02:22:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:15,978 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:15,978 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:16,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-05-22 02:22:16,179 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:16,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:16,179 INFO L82 PathProgramCache]: Analyzing trace with hash -63941052, now seen corresponding path program 118 times [2021-05-22 02:22:16,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:16,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661302920] [2021-05-22 02:22:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:16,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:16,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661302920] [2021-05-22 02:22:16,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661302920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:16,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209584307] [2021-05-22 02:22:16,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:16,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:22:16,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:16,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:16,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:16,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209584307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:16,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:16,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:16,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767933777] [2021-05-22 02:22:16,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:16,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:16,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:16,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:16,403 INFO L87 Difference]: Start difference. First operand 113 states and 241 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:16,511 INFO L93 Difference]: Finished difference Result 137 states and 289 transitions. [2021-05-22 02:22:16,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:22:16,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:16,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:16,512 INFO L225 Difference]: With dead ends: 137 [2021-05-22 02:22:16,512 INFO L226 Difference]: Without dead ends: 137 [2021-05-22 02:22:16,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:22:16,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-22 02:22:16,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 113. [2021-05-22 02:22:16,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-05-22 02:22:16,513 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 17 [2021-05-22 02:22:16,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:16,513 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-05-22 02:22:16,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-05-22 02:22:16,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:16,513 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:16,514 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:16,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-05-22 02:22:16,714 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:16,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:16,714 INFO L82 PathProgramCache]: Analyzing trace with hash 223609183, now seen corresponding path program 119 times [2021-05-22 02:22:16,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:16,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411775559] [2021-05-22 02:22:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:16,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:16,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411775559] [2021-05-22 02:22:16,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411775559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:16,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380216317] [2021-05-22 02:22:16,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:16,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:22:16,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:16,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:16,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:17,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380216317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:17,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:17,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:17,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306713473] [2021-05-22 02:22:17,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:17,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:17,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:17,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:17,007 INFO L87 Difference]: Start difference. First operand 113 states and 241 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:17,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:17,112 INFO L93 Difference]: Finished difference Result 122 states and 259 transitions. [2021-05-22 02:22:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:22:17,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:17,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:17,113 INFO L225 Difference]: With dead ends: 122 [2021-05-22 02:22:17,113 INFO L226 Difference]: Without dead ends: 122 [2021-05-22 02:22:17,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:22:17,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-22 02:22:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2021-05-22 02:22:17,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-05-22 02:22:17,114 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 17 [2021-05-22 02:22:17,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:17,114 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-05-22 02:22:17,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:17,115 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-05-22 02:22:17,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:17,115 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:17,115 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:17,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:17,315 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:17,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:17,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1569801307, now seen corresponding path program 120 times [2021-05-22 02:22:17,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:17,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837025605] [2021-05-22 02:22:17,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:17,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:17,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837025605] [2021-05-22 02:22:17,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837025605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:17,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357006621] [2021-05-22 02:22:17,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:17,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:22:17,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:17,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:17,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:17,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357006621] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:17,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:17,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:17,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791896541] [2021-05-22 02:22:17,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:17,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:17,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:17,535 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:17,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:17,736 INFO L93 Difference]: Finished difference Result 147 states and 302 transitions. [2021-05-22 02:22:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:22:17,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:17,737 INFO L225 Difference]: With dead ends: 147 [2021-05-22 02:22:17,737 INFO L226 Difference]: Without dead ends: 147 [2021-05-22 02:22:17,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:22:17,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-22 02:22:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 116. [2021-05-22 02:22:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1478260869565218) internal successors, (247), 115 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 247 transitions. [2021-05-22 02:22:17,738 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 247 transitions. Word has length 17 [2021-05-22 02:22:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:17,739 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 247 transitions. [2021-05-22 02:22:17,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 247 transitions. [2021-05-22 02:22:17,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:17,739 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:17,739 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:17,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:17,955 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:17,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:17,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1031945729, now seen corresponding path program 121 times [2021-05-22 02:22:17,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:17,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772993807] [2021-05-22 02:22:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:18,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:18,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772993807] [2021-05-22 02:22:18,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772993807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:18,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131232472] [2021-05-22 02:22:18,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:18,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:18,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:18,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131232472] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:18,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:18,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:18,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920280125] [2021-05-22 02:22:18,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:18,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:18,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:18,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:18,174 INFO L87 Difference]: Start difference. First operand 116 states and 247 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:18,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:18,300 INFO L93 Difference]: Finished difference Result 128 states and 269 transitions. [2021-05-22 02:22:18,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-22 02:22:18,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:18,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:18,301 INFO L225 Difference]: With dead ends: 128 [2021-05-22 02:22:18,301 INFO L226 Difference]: Without dead ends: 128 [2021-05-22 02:22:18,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:22:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-22 02:22:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2021-05-22 02:22:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-05-22 02:22:18,302 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 17 [2021-05-22 02:22:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:18,302 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-05-22 02:22:18,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:18,302 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-05-22 02:22:18,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:18,302 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:18,303 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:18,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:18,509 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:18,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:18,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1247924961, now seen corresponding path program 122 times [2021-05-22 02:22:18,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:18,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950833539] [2021-05-22 02:22:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:18,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:18,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950833539] [2021-05-22 02:22:18,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950833539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:18,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210152152] [2021-05-22 02:22:18,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:18,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:22:18,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:18,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:18,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:18,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210152152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:18,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:18,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:18,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250691008] [2021-05-22 02:22:18,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:18,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:18,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:18,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:18,712 INFO L87 Difference]: Start difference. First operand 112 states and 237 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:18,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:18,978 INFO L93 Difference]: Finished difference Result 141 states and 287 transitions. [2021-05-22 02:22:18,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:22:18,978 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:18,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:18,979 INFO L225 Difference]: With dead ends: 141 [2021-05-22 02:22:18,979 INFO L226 Difference]: Without dead ends: 139 [2021-05-22 02:22:18,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:22:18,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-22 02:22:18,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2021-05-22 02:22:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-05-22 02:22:18,980 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-05-22 02:22:18,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:18,980 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-05-22 02:22:18,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:18,980 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-05-22 02:22:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:18,980 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:18,980 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:19,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:19,181 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:19,181 INFO L82 PathProgramCache]: Analyzing trace with hash 86666369, now seen corresponding path program 123 times [2021-05-22 02:22:19,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:19,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265390452] [2021-05-22 02:22:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:19,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:19,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:19,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265390452] [2021-05-22 02:22:19,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265390452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:19,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582570398] [2021-05-22 02:22:19,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:19,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:22:19,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:19,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:19,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:19,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582570398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:19,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:19,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:19,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124665518] [2021-05-22 02:22:19,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:19,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:19,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:19,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:19,384 INFO L87 Difference]: Start difference. First operand 117 states and 249 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:19,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:19,691 INFO L93 Difference]: Finished difference Result 147 states and 301 transitions. [2021-05-22 02:22:19,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:22:19,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:19,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:19,692 INFO L225 Difference]: With dead ends: 147 [2021-05-22 02:22:19,692 INFO L226 Difference]: Without dead ends: 147 [2021-05-22 02:22:19,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 329.1ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:22:19,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-22 02:22:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 117. [2021-05-22 02:22:19,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:19,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-05-22 02:22:19,694 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-05-22 02:22:19,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:19,694 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-05-22 02:22:19,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:19,694 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-05-22 02:22:19,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:19,694 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:19,694 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:19,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable722 [2021-05-22 02:22:19,894 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:19,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:19,895 INFO L82 PathProgramCache]: Analyzing trace with hash -451189209, now seen corresponding path program 124 times [2021-05-22 02:22:19,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:19,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965448962] [2021-05-22 02:22:19,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:19,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:19,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965448962] [2021-05-22 02:22:19,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965448962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:19,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623883040] [2021-05-22 02:22:19,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:19,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:22:19,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:19,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:19,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:20,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623883040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:20,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:20,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:20,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497501797] [2021-05-22 02:22:20,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:20,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:20,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:20,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:20,091 INFO L87 Difference]: Start difference. First operand 117 states and 249 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:20,324 INFO L93 Difference]: Finished difference Result 139 states and 291 transitions. [2021-05-22 02:22:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:22:20,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:20,325 INFO L225 Difference]: With dead ends: 139 [2021-05-22 02:22:20,325 INFO L226 Difference]: Without dead ends: 139 [2021-05-22 02:22:20,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:22:20,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-22 02:22:20,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2021-05-22 02:22:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.146551724137931) internal successors, (249), 116 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 249 transitions. [2021-05-22 02:22:20,326 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 249 transitions. Word has length 17 [2021-05-22 02:22:20,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:20,326 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 249 transitions. [2021-05-22 02:22:20,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 249 transitions. [2021-05-22 02:22:20,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:20,327 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:20,327 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:20,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:20,527 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:20,527 INFO L82 PathProgramCache]: Analyzing trace with hash 55157057, now seen corresponding path program 125 times [2021-05-22 02:22:20,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:20,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743541557] [2021-05-22 02:22:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:20,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:20,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743541557] [2021-05-22 02:22:20,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743541557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:20,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546730828] [2021-05-22 02:22:20,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:20,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:22:20,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:20,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:20,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:20,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546730828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:20,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:20,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-22 02:22:20,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229093857] [2021-05-22 02:22:20,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:22:20,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:20,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:22:20,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:22:20,733 INFO L87 Difference]: Start difference. First operand 117 states and 249 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:20,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:20,908 INFO L93 Difference]: Finished difference Result 132 states and 276 transitions. [2021-05-22 02:22:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:22:20,908 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:20,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:20,908 INFO L225 Difference]: With dead ends: 132 [2021-05-22 02:22:20,908 INFO L226 Difference]: Without dead ends: 132 [2021-05-22 02:22:20,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:22:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-22 02:22:20,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2021-05-22 02:22:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:20,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-05-22 02:22:20,910 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 17 [2021-05-22 02:22:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:20,910 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-05-22 02:22:20,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-05-22 02:22:20,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:20,910 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:20,910 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:21,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-05-22 02:22:21,111 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:21,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:21,111 INFO L82 PathProgramCache]: Analyzing trace with hash -436365568, now seen corresponding path program 126 times [2021-05-22 02:22:21,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:21,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095242222] [2021-05-22 02:22:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:21,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:21,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095242222] [2021-05-22 02:22:21,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095242222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:21,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575942941] [2021-05-22 02:22:21,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:21,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:22:21,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:21,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:21,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:21,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575942941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:21,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:21,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:21,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458227127] [2021-05-22 02:22:21,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:21,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:21,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:21,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:21,333 INFO L87 Difference]: Start difference. First operand 112 states and 236 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:21,502 INFO L93 Difference]: Finished difference Result 126 states and 264 transitions. [2021-05-22 02:22:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:22:21,502 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:21,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:21,502 INFO L225 Difference]: With dead ends: 126 [2021-05-22 02:22:21,502 INFO L226 Difference]: Without dead ends: 126 [2021-05-22 02:22:21,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 220.3ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:22:21,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-22 02:22:21,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2021-05-22 02:22:21,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:21,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-05-22 02:22:21,504 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 17 [2021-05-22 02:22:21,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:21,504 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-05-22 02:22:21,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:21,504 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-05-22 02:22:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:21,504 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:21,504 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:21,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable733,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:21,705 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:21,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:21,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1487766277, now seen corresponding path program 127 times [2021-05-22 02:22:21,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:21,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900301337] [2021-05-22 02:22:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:21,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:21,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900301337] [2021-05-22 02:22:21,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900301337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:21,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585092844] [2021-05-22 02:22:21,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:21,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:21,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:21,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585092844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:21,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:21,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:21,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408201335] [2021-05-22 02:22:21,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:21,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:21,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:21,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:21,998 INFO L87 Difference]: Start difference. First operand 112 states and 236 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:22,131 INFO L93 Difference]: Finished difference Result 120 states and 252 transitions. [2021-05-22 02:22:22,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:22:22,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:22,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:22,132 INFO L225 Difference]: With dead ends: 120 [2021-05-22 02:22:22,132 INFO L226 Difference]: Without dead ends: 120 [2021-05-22 02:22:22,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:22:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-22 02:22:22,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2021-05-22 02:22:22,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.128440366972477) internal successors, (232), 109 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:22,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 232 transitions. [2021-05-22 02:22:22,133 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 232 transitions. Word has length 17 [2021-05-22 02:22:22,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:22,133 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 232 transitions. [2021-05-22 02:22:22,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 232 transitions. [2021-05-22 02:22:22,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:22,134 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:22,134 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:22,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-05-22 02:22:22,334 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:22,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:22,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1994112543, now seen corresponding path program 128 times [2021-05-22 02:22:22,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:22,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184068779] [2021-05-22 02:22:22,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:22,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:22,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184068779] [2021-05-22 02:22:22,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184068779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:22,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67587069] [2021-05-22 02:22:22,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:22,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:22:22,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:22,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:22,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:22,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67587069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:22,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:22,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:22,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175803310] [2021-05-22 02:22:22,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:22,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:22,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:22,569 INFO L87 Difference]: Start difference. First operand 110 states and 232 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:22,736 INFO L93 Difference]: Finished difference Result 145 states and 297 transitions. [2021-05-22 02:22:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:22:22,736 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:22,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:22,736 INFO L225 Difference]: With dead ends: 145 [2021-05-22 02:22:22,736 INFO L226 Difference]: Without dead ends: 145 [2021-05-22 02:22:22,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 208.4ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:22:22,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-22 02:22:22,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2021-05-22 02:22:22,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.142857142857143) internal successors, (240), 112 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:22,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 240 transitions. [2021-05-22 02:22:22,738 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 240 transitions. Word has length 17 [2021-05-22 02:22:22,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:22,738 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 240 transitions. [2021-05-22 02:22:22,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:22,738 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 240 transitions. [2021-05-22 02:22:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:22,738 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:22,738 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:22,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-05-22 02:22:22,955 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:22,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:22,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1456256965, now seen corresponding path program 129 times [2021-05-22 02:22:22,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:22,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895001046] [2021-05-22 02:22:22,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:23,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:23,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895001046] [2021-05-22 02:22:23,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895001046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:23,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226133377] [2021-05-22 02:22:23,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:23,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:22:23,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:23,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:23,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:23,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226133377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:23,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:23,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:23,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151377348] [2021-05-22 02:22:23,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:23,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:23,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:23,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:23,171 INFO L87 Difference]: Start difference. First operand 113 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:23,300 INFO L93 Difference]: Finished difference Result 129 states and 270 transitions. [2021-05-22 02:22:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:22:23,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:23,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:23,301 INFO L225 Difference]: With dead ends: 129 [2021-05-22 02:22:23,301 INFO L226 Difference]: Without dead ends: 129 [2021-05-22 02:22:23,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:22:23,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-22 02:22:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 108. [2021-05-22 02:22:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-05-22 02:22:23,302 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 17 [2021-05-22 02:22:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:23,302 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-05-22 02:22:23,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-05-22 02:22:23,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:23,302 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:23,302 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:23,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable747,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:23,503 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:23,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:23,503 INFO L82 PathProgramCache]: Analyzing trace with hash -616418488, now seen corresponding path program 130 times [2021-05-22 02:22:23,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:23,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719863113] [2021-05-22 02:22:23,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:23,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:23,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719863113] [2021-05-22 02:22:23,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719863113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:23,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631729096] [2021-05-22 02:22:23,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:23,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:22:23,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:23,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:23,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:23,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631729096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:23,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:23,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:23,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605671071] [2021-05-22 02:22:23,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:23,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:23,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:23,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:23,766 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:23,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:23,837 INFO L93 Difference]: Finished difference Result 111 states and 234 transitions. [2021-05-22 02:22:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:22:23,837 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:23,837 INFO L225 Difference]: With dead ends: 111 [2021-05-22 02:22:23,837 INFO L226 Difference]: Without dead ends: 111 [2021-05-22 02:22:23,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:23,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-22 02:22:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2021-05-22 02:22:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-05-22 02:22:23,839 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 17 [2021-05-22 02:22:23,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:23,839 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-05-22 02:22:23,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-05-22 02:22:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:23,839 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:23,839 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:24,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:24,049 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:24,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:24,049 INFO L82 PathProgramCache]: Analyzing trace with hash -328868253, now seen corresponding path program 131 times [2021-05-22 02:22:24,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:24,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530905124] [2021-05-22 02:22:24,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:24,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:24,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530905124] [2021-05-22 02:22:24,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530905124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:24,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736553472] [2021-05-22 02:22:24,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:24,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:22:24,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:24,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:24,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:24,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:24,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736553472] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:24,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:24,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:24,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878153110] [2021-05-22 02:22:24,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:24,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:24,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:24,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:24,258 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:24,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:24,428 INFO L93 Difference]: Finished difference Result 146 states and 291 transitions. [2021-05-22 02:22:24,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:22:24,428 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:24,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:24,429 INFO L225 Difference]: With dead ends: 146 [2021-05-22 02:22:24,429 INFO L226 Difference]: Without dead ends: 146 [2021-05-22 02:22:24,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:22:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-22 02:22:24,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-05-22 02:22:24,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.142857142857143) internal successors, (240), 112 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 240 transitions. [2021-05-22 02:22:24,430 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 240 transitions. Word has length 17 [2021-05-22 02:22:24,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:24,430 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 240 transitions. [2021-05-22 02:22:24,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 240 transitions. [2021-05-22 02:22:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:24,430 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:24,430 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:24,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-05-22 02:22:24,631 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:24,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:24,631 INFO L82 PathProgramCache]: Analyzing trace with hash -26877973, now seen corresponding path program 132 times [2021-05-22 02:22:24,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:24,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117296340] [2021-05-22 02:22:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:24,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:24,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117296340] [2021-05-22 02:22:24,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117296340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:24,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803008089] [2021-05-22 02:22:24,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:24,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:22:24,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:24,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:24,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:24,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803008089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:24,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:24,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:24,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496975072] [2021-05-22 02:22:24,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:24,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:24,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:24,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:24,888 INFO L87 Difference]: Start difference. First operand 113 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:24,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:24,976 INFO L93 Difference]: Finished difference Result 135 states and 282 transitions. [2021-05-22 02:22:24,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:22:24,976 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:24,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:24,976 INFO L225 Difference]: With dead ends: 135 [2021-05-22 02:22:24,976 INFO L226 Difference]: Without dead ends: 135 [2021-05-22 02:22:24,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-22 02:22:24,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-05-22 02:22:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.144144144144144) internal successors, (238), 111 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 238 transitions. [2021-05-22 02:22:24,978 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 238 transitions. Word has length 17 [2021-05-22 02:22:24,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:24,978 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 238 transitions. [2021-05-22 02:22:24,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:24,978 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 238 transitions. [2021-05-22 02:22:24,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:24,978 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:24,978 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:25,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-05-22 02:22:25,178 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:25,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:25,179 INFO L82 PathProgramCache]: Analyzing trace with hash 479468293, now seen corresponding path program 133 times [2021-05-22 02:22:25,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:25,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345508044] [2021-05-22 02:22:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:25,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:25,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345508044] [2021-05-22 02:22:25,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345508044] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:25,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716006951] [2021-05-22 02:22:25,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:25,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:25,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:25,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716006951] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:25,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:25,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-22 02:22:25,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279845282] [2021-05-22 02:22:25,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:22:25,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:25,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:22:25,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:22:25,383 INFO L87 Difference]: Start difference. First operand 112 states and 238 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:25,564 INFO L93 Difference]: Finished difference Result 125 states and 260 transitions. [2021-05-22 02:22:25,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:22:25,564 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:25,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:25,565 INFO L225 Difference]: With dead ends: 125 [2021-05-22 02:22:25,565 INFO L226 Difference]: Without dead ends: 125 [2021-05-22 02:22:25,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:22:25,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-22 02:22:25,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2021-05-22 02:22:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.116504854368932) internal successors, (218), 103 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 218 transitions. [2021-05-22 02:22:25,566 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 218 transitions. Word has length 17 [2021-05-22 02:22:25,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:25,566 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 218 transitions. [2021-05-22 02:22:25,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 218 transitions. [2021-05-22 02:22:25,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:25,566 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:25,566 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:25,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-05-22 02:22:25,767 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:25,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:25,767 INFO L82 PathProgramCache]: Analyzing trace with hash 21357727, now seen corresponding path program 134 times [2021-05-22 02:22:25,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:25,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182978030] [2021-05-22 02:22:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:25,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:25,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182978030] [2021-05-22 02:22:25,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182978030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:25,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15187818] [2021-05-22 02:22:25,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:25,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:22:25,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:25,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:25,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:25,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15187818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:25,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:25,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:25,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565616356] [2021-05-22 02:22:25,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:25,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:25,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:25,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:25,954 INFO L87 Difference]: Start difference. First operand 104 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:26,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:26,114 INFO L93 Difference]: Finished difference Result 156 states and 309 transitions. [2021-05-22 02:22:26,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:22:26,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:26,115 INFO L225 Difference]: With dead ends: 156 [2021-05-22 02:22:26,115 INFO L226 Difference]: Without dead ends: 154 [2021-05-22 02:22:26,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:22:26,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-22 02:22:26,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 112. [2021-05-22 02:22:26,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:26,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-05-22 02:22:26,116 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 17 [2021-05-22 02:22:26,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:26,117 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-05-22 02:22:26,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-05-22 02:22:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:26,117 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:26,117 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:26,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable767,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:26,333 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:26,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1355949057, now seen corresponding path program 135 times [2021-05-22 02:22:26,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:26,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865544536] [2021-05-22 02:22:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:26,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:26,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865544536] [2021-05-22 02:22:26,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865544536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:26,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854945351] [2021-05-22 02:22:26,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:26,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:22:26,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:26,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:26,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:26,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854945351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:26,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:26,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:26,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43203167] [2021-05-22 02:22:26,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:26,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:26,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:26,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:26,547 INFO L87 Difference]: Start difference. First operand 112 states and 237 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:26,777 INFO L93 Difference]: Finished difference Result 158 states and 315 transitions. [2021-05-22 02:22:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:22:26,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:26,778 INFO L225 Difference]: With dead ends: 158 [2021-05-22 02:22:26,778 INFO L226 Difference]: Without dead ends: 158 [2021-05-22 02:22:26,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:22:26,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-22 02:22:26,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2021-05-22 02:22:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1363636363636362) internal successors, (235), 110 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 235 transitions. [2021-05-22 02:22:26,779 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 235 transitions. Word has length 17 [2021-05-22 02:22:26,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:26,779 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 235 transitions. [2021-05-22 02:22:26,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:26,779 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 235 transitions. [2021-05-22 02:22:26,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:26,779 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:26,779 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:26,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-05-22 02:22:26,980 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:26,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:26,980 INFO L82 PathProgramCache]: Analyzing trace with hash 818093479, now seen corresponding path program 136 times [2021-05-22 02:22:26,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:26,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088515321] [2021-05-22 02:22:26,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:27,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:27,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088515321] [2021-05-22 02:22:27,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088515321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:27,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236809496] [2021-05-22 02:22:27,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:27,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:22:27,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:27,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:27,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:27,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236809496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:27,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:27,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:22:27,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733932069] [2021-05-22 02:22:27,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:22:27,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:27,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:22:27,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:22:27,182 INFO L87 Difference]: Start difference. First operand 111 states and 235 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:27,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:27,343 INFO L93 Difference]: Finished difference Result 157 states and 319 transitions. [2021-05-22 02:22:27,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:22:27,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:27,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:27,345 INFO L225 Difference]: With dead ends: 157 [2021-05-22 02:22:27,345 INFO L226 Difference]: Without dead ends: 157 [2021-05-22 02:22:27,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:22:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-22 02:22:27,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2021-05-22 02:22:27,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:27,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-05-22 02:22:27,346 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 17 [2021-05-22 02:22:27,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:27,346 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-05-22 02:22:27,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:27,346 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-05-22 02:22:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:27,347 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:27,347 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:27,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable778 [2021-05-22 02:22:27,547 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:27,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:27,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1324439745, now seen corresponding path program 137 times [2021-05-22 02:22:27,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:27,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512470421] [2021-05-22 02:22:27,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:27,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:27,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512470421] [2021-05-22 02:22:27,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512470421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:27,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982837158] [2021-05-22 02:22:27,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:27,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:22:27,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:27,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-22 02:22:27,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:27,987 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-05-22 02:22:28,164 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:22:28,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-05-22 02:22:28,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:22:28,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:22:28,207 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-22 02:22:28,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-05-22 02:22:28,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-22 02:22:28,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:22:28,231 INFO L518 ElimStorePlain]: Eliminatee scoreA vanished before elimination [2021-05-22 02:22:28,231 INFO L518 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2021-05-22 02:22:28,237 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-22 02:22:28,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-05-22 02:22:28,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-22 02:22:28,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-22 02:22:28,257 INFO L518 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2021-05-22 02:22:28,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-22 02:22:28,269 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 9 variables, input treesize:115, output treesize:50 [2021-05-22 02:22:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:28,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982837158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:28,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:28,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-22 02:22:28,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780191094] [2021-05-22 02:22:28,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-22 02:22:28,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:28,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-22 02:22:28,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-05-22 02:22:28,321 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:28,710 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-05-22 02:22:28,904 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-05-22 02:22:29,103 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-05-22 02:22:29,328 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-05-22 02:22:29,565 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-05-22 02:22:29,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:29,910 INFO L93 Difference]: Finished difference Result 205 states and 400 transitions. [2021-05-22 02:22:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:22:29,911 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:29,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:29,911 INFO L225 Difference]: With dead ends: 205 [2021-05-22 02:22:29,911 INFO L226 Difference]: Without dead ends: 205 [2021-05-22 02:22:29,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1787.6ms TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:22:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-22 02:22:29,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 109. [2021-05-22 02:22:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.138888888888889) internal successors, (231), 108 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 231 transitions. [2021-05-22 02:22:29,913 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 231 transitions. Word has length 17 [2021-05-22 02:22:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:29,913 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 231 transitions. [2021-05-22 02:22:29,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:29,913 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 231 transitions. [2021-05-22 02:22:29,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-22 02:22:29,913 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:29,913 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:30,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable781 [2021-05-22 02:22:30,113 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:30,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:30,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1767338885, now seen corresponding path program 138 times [2021-05-22 02:22:30,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:30,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34330294] [2021-05-22 02:22:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:30,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:30,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34330294] [2021-05-22 02:22:30,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34330294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:30,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166034377] [2021-05-22 02:22:30,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:30,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:22:30,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:30,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:22:30,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:30,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166034377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:30,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:30,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-22 02:22:30,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476213792] [2021-05-22 02:22:30,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-22 02:22:30,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:30,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-22 02:22:30,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:22:30,324 INFO L87 Difference]: Start difference. First operand 109 states and 231 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:30,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:30,588 INFO L93 Difference]: Finished difference Result 157 states and 318 transitions. [2021-05-22 02:22:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:22:30,588 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-22 02:22:30,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:30,588 INFO L225 Difference]: With dead ends: 157 [2021-05-22 02:22:30,588 INFO L226 Difference]: Without dead ends: 157 [2021-05-22 02:22:30,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:22:30,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-22 02:22:30,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 104. [2021-05-22 02:22:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.116504854368932) internal successors, (218), 103 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:30,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 218 transitions. [2021-05-22 02:22:30,590 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 218 transitions. Word has length 17 [2021-05-22 02:22:30,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:30,590 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 218 transitions. [2021-05-22 02:22:30,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:30,590 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 218 transitions. [2021-05-22 02:22:30,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:30,590 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:30,590 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:30,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable790,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:30,791 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:30,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:30,791 INFO L82 PathProgramCache]: Analyzing trace with hash 316048736, now seen corresponding path program 139 times [2021-05-22 02:22:30,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:30,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310153594] [2021-05-22 02:22:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:30,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:30,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:30,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310153594] [2021-05-22 02:22:30,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310153594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:30,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817133925] [2021-05-22 02:22:30,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:30,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:22:30,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:31,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:31,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817133925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:31,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:31,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:22:31,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356196019] [2021-05-22 02:22:31,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:22:31,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:31,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:22:31,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:22:31,299 INFO L87 Difference]: Start difference. First operand 104 states and 218 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:31,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:31,734 INFO L93 Difference]: Finished difference Result 167 states and 331 transitions. [2021-05-22 02:22:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:22:31,735 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:31,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:31,735 INFO L225 Difference]: With dead ends: 167 [2021-05-22 02:22:31,735 INFO L226 Difference]: Without dead ends: 150 [2021-05-22 02:22:31,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 700.8ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:22:31,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-22 02:22:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 105. [2021-05-22 02:22:31,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.1153846153846154) internal successors, (220), 104 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:31,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 220 transitions. [2021-05-22 02:22:31,737 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 220 transitions. Word has length 18 [2021-05-22 02:22:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:31,737 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 220 transitions. [2021-05-22 02:22:31,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:31,737 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 220 transitions. [2021-05-22 02:22:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:31,737 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:31,737 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:31,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-05-22 02:22:31,937 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:31,938 INFO L82 PathProgramCache]: Analyzing trace with hash -37090754, now seen corresponding path program 140 times [2021-05-22 02:22:31,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:31,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201191481] [2021-05-22 02:22:31,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:32,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:32,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201191481] [2021-05-22 02:22:32,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201191481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:32,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363354025] [2021-05-22 02:22:32,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:32,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:22:32,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:32,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:22:32,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:32,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363354025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:32,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:32,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:22:32,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490733070] [2021-05-22 02:22:32,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:22:32,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:32,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:22:32,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:22:32,651 INFO L87 Difference]: Start difference. First operand 105 states and 220 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:33,012 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-05-22 02:22:33,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:33,475 INFO L93 Difference]: Finished difference Result 166 states and 330 transitions. [2021-05-22 02:22:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:22:33,476 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:33,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:33,476 INFO L225 Difference]: With dead ends: 166 [2021-05-22 02:22:33,476 INFO L226 Difference]: Without dead ends: 151 [2021-05-22 02:22:33,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1212.0ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:22:33,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-22 02:22:33,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2021-05-22 02:22:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.1142857142857143) internal successors, (222), 105 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:33,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 222 transitions. [2021-05-22 02:22:33,478 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 222 transitions. Word has length 18 [2021-05-22 02:22:33,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:33,481 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 222 transitions. [2021-05-22 02:22:33,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:33,481 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 222 transitions. [2021-05-22 02:22:33,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:33,481 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:33,481 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:33,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:33,681 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:33,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:33,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1690044128, now seen corresponding path program 141 times [2021-05-22 02:22:33,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:33,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444629168] [2021-05-22 02:22:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:34,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:34,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444629168] [2021-05-22 02:22:34,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444629168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:34,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413500904] [2021-05-22 02:22:34,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:34,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:22:34,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:34,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-22 02:22:34,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:34,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413500904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:34,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:34,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:22:34,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025196445] [2021-05-22 02:22:34,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:22:34,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:34,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:22:34,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:22:34,403 INFO L87 Difference]: Start difference. First operand 106 states and 222 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:35,048 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-05-22 02:22:35,189 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-05-22 02:22:35,417 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2021-05-22 02:22:35,560 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-05-22 02:22:35,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:35,688 INFO L93 Difference]: Finished difference Result 187 states and 361 transitions. [2021-05-22 02:22:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:22:35,688 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:35,689 INFO L225 Difference]: With dead ends: 187 [2021-05-22 02:22:35,689 INFO L226 Difference]: Without dead ends: 180 [2021-05-22 02:22:35,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1657.5ms TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:22:35,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-22 02:22:35,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 107. [2021-05-22 02:22:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 106 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 225 transitions. [2021-05-22 02:22:35,690 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 225 transitions. Word has length 18 [2021-05-22 02:22:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:35,690 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 225 transitions. [2021-05-22 02:22:35,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:35,690 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 225 transitions. [2021-05-22 02:22:35,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:35,691 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:35,691 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:35,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:35,891 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:35,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1027581438, now seen corresponding path program 142 times [2021-05-22 02:22:35,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:35,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849510586] [2021-05-22 02:22:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:36,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:36,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849510586] [2021-05-22 02:22:36,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849510586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:36,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578743853] [2021-05-22 02:22:36,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:36,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:22:36,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:36,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:22:36,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:36,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578743853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:36,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:36,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:22:36,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205630902] [2021-05-22 02:22:36,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:22:36,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:36,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:22:36,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:22:36,672 INFO L87 Difference]: Start difference. First operand 107 states and 225 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:37,704 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2021-05-22 02:22:37,940 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 59 [2021-05-22 02:22:38,177 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 74 [2021-05-22 02:22:38,368 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-05-22 02:22:38,529 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 61 [2021-05-22 02:22:38,679 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 55 [2021-05-22 02:22:38,821 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 56 [2021-05-22 02:22:38,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:38,836 INFO L93 Difference]: Finished difference Result 207 states and 398 transitions. [2021-05-22 02:22:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:22:38,837 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:38,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:38,837 INFO L225 Difference]: With dead ends: 207 [2021-05-22 02:22:38,837 INFO L226 Difference]: Without dead ends: 181 [2021-05-22 02:22:38,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 2505.8ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:22:38,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-22 02:22:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 112. [2021-05-22 02:22:38,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.126126126126126) internal successors, (236), 111 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:38,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 236 transitions. [2021-05-22 02:22:38,839 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 236 transitions. Word has length 18 [2021-05-22 02:22:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:38,839 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 236 transitions. [2021-05-22 02:22:38,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:38,839 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 236 transitions. [2021-05-22 02:22:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:38,839 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:38,839 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:39,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:39,040 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:39,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:39,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2075337876, now seen corresponding path program 143 times [2021-05-22 02:22:39,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:39,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853927995] [2021-05-22 02:22:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:39,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:39,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853927995] [2021-05-22 02:22:39,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853927995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:39,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982546221] [2021-05-22 02:22:39,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:39,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:22:39,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:39,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:22:39,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:39,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982546221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:39,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:39,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:22:39,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528430918] [2021-05-22 02:22:39,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:22:39,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:39,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:22:39,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:22:39,607 INFO L87 Difference]: Start difference. First operand 112 states and 236 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:40,161 INFO L93 Difference]: Finished difference Result 137 states and 274 transitions. [2021-05-22 02:22:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:22:40,161 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:40,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:40,162 INFO L225 Difference]: With dead ends: 137 [2021-05-22 02:22:40,162 INFO L226 Difference]: Without dead ends: 122 [2021-05-22 02:22:40,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 783.1ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:22:40,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-22 02:22:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2021-05-22 02:22:40,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-05-22 02:22:40,163 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 18 [2021-05-22 02:22:40,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:40,163 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-05-22 02:22:40,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:40,163 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-05-22 02:22:40,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:40,163 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:40,163 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:40,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-05-22 02:22:40,371 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:40,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:40,371 INFO L82 PathProgramCache]: Analyzing trace with hash 422384502, now seen corresponding path program 144 times [2021-05-22 02:22:40,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:40,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286176402] [2021-05-22 02:22:40,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:40,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:40,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286176402] [2021-05-22 02:22:40,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286176402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:40,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629302688] [2021-05-22 02:22:40,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:40,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:22:40,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:40,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:22:40,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:40,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629302688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:40,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:40,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:22:40,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822235608] [2021-05-22 02:22:40,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:22:40,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:40,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:22:40,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:22:40,970 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:41,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:41,621 INFO L93 Difference]: Finished difference Result 142 states and 291 transitions. [2021-05-22 02:22:41,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:22:41,622 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:41,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:41,622 INFO L225 Difference]: With dead ends: 142 [2021-05-22 02:22:41,622 INFO L226 Difference]: Without dead ends: 129 [2021-05-22 02:22:41,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 927.4ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:22:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-22 02:22:41,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 114. [2021-05-22 02:22:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1238938053097347) internal successors, (240), 113 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 240 transitions. [2021-05-22 02:22:41,623 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 240 transitions. Word has length 18 [2021-05-22 02:22:41,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:41,623 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 240 transitions. [2021-05-22 02:22:41,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:41,623 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 240 transitions. [2021-05-22 02:22:41,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:41,624 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:41,624 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:41,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-05-22 02:22:41,839 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:41,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:41,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1154957228, now seen corresponding path program 145 times [2021-05-22 02:22:41,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:41,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758669843] [2021-05-22 02:22:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:41,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:42,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:42,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758669843] [2021-05-22 02:22:42,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758669843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:42,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344510189] [2021-05-22 02:22:42,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:42,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:22:42,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:42,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344510189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:42,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:42,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:22:42,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350529066] [2021-05-22 02:22:42,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:22:42,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:42,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:22:42,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:22:42,416 INFO L87 Difference]: Start difference. First operand 114 states and 240 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:43,233 INFO L93 Difference]: Finished difference Result 148 states and 296 transitions. [2021-05-22 02:22:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:22:43,233 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:43,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:43,234 INFO L225 Difference]: With dead ends: 148 [2021-05-22 02:22:43,234 INFO L226 Difference]: Without dead ends: 141 [2021-05-22 02:22:43,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1010.6ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:22:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-22 02:22:43,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2021-05-22 02:22:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1315789473684212) internal successors, (243), 114 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:43,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 243 transitions. [2021-05-22 02:22:43,235 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 243 transitions. Word has length 18 [2021-05-22 02:22:43,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:43,235 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 243 transitions. [2021-05-22 02:22:43,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:43,235 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 243 transitions. [2021-05-22 02:22:43,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:43,235 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:43,236 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:43,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-05-22 02:22:43,436 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:43,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:43,436 INFO L82 PathProgramCache]: Analyzing trace with hash 179634102, now seen corresponding path program 146 times [2021-05-22 02:22:43,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:43,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572255369] [2021-05-22 02:22:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:43,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:43,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572255369] [2021-05-22 02:22:43,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572255369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:43,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745217779] [2021-05-22 02:22:43,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:43,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:22:43,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:43,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:22:43,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:44,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745217779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:44,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:44,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:22:44,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35421086] [2021-05-22 02:22:44,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:22:44,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:44,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:22:44,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:22:44,040 INFO L87 Difference]: Start difference. First operand 115 states and 243 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:44,653 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-05-22 02:22:44,836 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-05-22 02:22:45,101 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-05-22 02:22:45,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:45,772 INFO L93 Difference]: Finished difference Result 249 states and 458 transitions. [2021-05-22 02:22:45,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:22:45,773 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:45,773 INFO L225 Difference]: With dead ends: 249 [2021-05-22 02:22:45,773 INFO L226 Difference]: Without dead ends: 212 [2021-05-22 02:22:45,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1884.6ms TimeCoverageRelationStatistics Valid=263, Invalid=1543, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:22:45,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-22 02:22:45,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 120. [2021-05-22 02:22:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:45,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-05-22 02:22:45,775 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 18 [2021-05-22 02:22:45,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:45,775 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-05-22 02:22:45,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:45,775 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-05-22 02:22:45,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:45,775 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:45,775 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:45,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable875 [2021-05-22 02:22:45,975 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:45,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:45,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1060750436, now seen corresponding path program 147 times [2021-05-22 02:22:45,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:45,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314343947] [2021-05-22 02:22:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:46,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:46,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314343947] [2021-05-22 02:22:46,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314343947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:46,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553270043] [2021-05-22 02:22:46,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:46,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:22:46,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:46,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:22:46,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:46,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553270043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:46,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:46,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:22:46,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632974655] [2021-05-22 02:22:46,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:22:46,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:46,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:22:46,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:22:46,514 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:46,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:46,837 INFO L93 Difference]: Finished difference Result 146 states and 301 transitions. [2021-05-22 02:22:46,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:22:46,837 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:46,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:46,837 INFO L225 Difference]: With dead ends: 146 [2021-05-22 02:22:46,837 INFO L226 Difference]: Without dead ends: 133 [2021-05-22 02:22:46,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 610.2ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:22:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-22 02:22:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2021-05-22 02:22:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.178861788617886) internal successors, (268), 123 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 268 transitions. [2021-05-22 02:22:46,839 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 268 transitions. Word has length 18 [2021-05-22 02:22:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:46,839 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 268 transitions. [2021-05-22 02:22:46,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 268 transitions. [2021-05-22 02:22:46,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:46,839 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:46,839 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:47,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable888,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:47,040 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:47,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1656875130, now seen corresponding path program 148 times [2021-05-22 02:22:47,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:47,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836414394] [2021-05-22 02:22:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:47,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:47,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836414394] [2021-05-22 02:22:47,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836414394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:47,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005396734] [2021-05-22 02:22:47,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:47,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:22:47,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:47,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:22:47,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:47,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005396734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:47,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:47,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:22:47,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877925599] [2021-05-22 02:22:47,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:22:47,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:47,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:22:47,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:22:47,605 INFO L87 Difference]: Start difference. First operand 124 states and 268 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:48,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:48,261 INFO L93 Difference]: Finished difference Result 171 states and 342 transitions. [2021-05-22 02:22:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:22:48,262 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:48,262 INFO L225 Difference]: With dead ends: 171 [2021-05-22 02:22:48,262 INFO L226 Difference]: Without dead ends: 160 [2021-05-22 02:22:48,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 887.2ms TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:22:48,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-22 02:22:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 125. [2021-05-22 02:22:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.1774193548387095) internal successors, (270), 124 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 270 transitions. [2021-05-22 02:22:48,264 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 270 transitions. Word has length 18 [2021-05-22 02:22:48,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:48,264 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 270 transitions. [2021-05-22 02:22:48,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:48,264 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 270 transitions. [2021-05-22 02:22:48,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:48,264 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:48,264 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:48,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable899 [2021-05-22 02:22:48,465 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:48,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1303500836, now seen corresponding path program 149 times [2021-05-22 02:22:48,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:48,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133935797] [2021-05-22 02:22:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:48,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:48,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133935797] [2021-05-22 02:22:48,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133935797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:48,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530056480] [2021-05-22 02:22:48,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:48,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:22:48,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:48,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:22:48,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:48,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530056480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:48,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:48,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:22:48,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716606385] [2021-05-22 02:22:48,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:22:48,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:48,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:22:48,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:22:48,982 INFO L87 Difference]: Start difference. First operand 125 states and 270 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:49,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:49,792 INFO L93 Difference]: Finished difference Result 224 states and 435 transitions. [2021-05-22 02:22:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:22:49,792 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:49,793 INFO L225 Difference]: With dead ends: 224 [2021-05-22 02:22:49,793 INFO L226 Difference]: Without dead ends: 198 [2021-05-22 02:22:49,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 980.8ms TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:22:49,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-22 02:22:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 128. [2021-05-22 02:22:49,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.173228346456693) internal successors, (276), 127 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:49,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 276 transitions. [2021-05-22 02:22:49,794 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 276 transitions. Word has length 18 [2021-05-22 02:22:49,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:49,794 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 276 transitions. [2021-05-22 02:22:49,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 276 transitions. [2021-05-22 02:22:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:49,795 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:49,795 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:49,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-05-22 02:22:49,995 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:49,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:49,995 INFO L82 PathProgramCache]: Analyzing trace with hash -2131745900, now seen corresponding path program 150 times [2021-05-22 02:22:49,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:49,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498880375] [2021-05-22 02:22:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:50,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:50,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498880375] [2021-05-22 02:22:50,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498880375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:50,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491169780] [2021-05-22 02:22:50,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:50,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:22:50,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:50,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-22 02:22:50,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:50,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491169780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:50,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:50,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:22:50,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461654936] [2021-05-22 02:22:50,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:22:50,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:50,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:22:50,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:22:50,512 INFO L87 Difference]: Start difference. First operand 128 states and 276 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:51,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:51,543 INFO L93 Difference]: Finished difference Result 225 states and 449 transitions. [2021-05-22 02:22:51,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:22:51,543 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:51,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:51,544 INFO L225 Difference]: With dead ends: 225 [2021-05-22 02:22:51,544 INFO L226 Difference]: Without dead ends: 207 [2021-05-22 02:22:51,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1158.2ms TimeCoverageRelationStatistics Valid=179, Invalid=1011, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:22:51,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-22 02:22:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 135. [2021-05-22 02:22:51,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1940298507462686) internal successors, (294), 134 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 294 transitions. [2021-05-22 02:22:51,545 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 294 transitions. Word has length 18 [2021-05-22 02:22:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:51,545 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 294 transitions. [2021-05-22 02:22:51,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:51,545 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 294 transitions. [2021-05-22 02:22:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:51,546 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:51,546 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:51,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable922,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:51,746 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:51,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:51,746 INFO L82 PathProgramCache]: Analyzing trace with hash -797154570, now seen corresponding path program 151 times [2021-05-22 02:22:51,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:51,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837465] [2021-05-22 02:22:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:51,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:51,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837465] [2021-05-22 02:22:51,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:51,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683820580] [2021-05-22 02:22:51,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:51,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:22:51,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:52,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683820580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:52,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:52,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:22:52,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244894480] [2021-05-22 02:22:52,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:22:52,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:52,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:22:52,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:22:52,216 INFO L87 Difference]: Start difference. First operand 135 states and 294 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:52,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:52,661 INFO L93 Difference]: Finished difference Result 198 states and 397 transitions. [2021-05-22 02:22:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:22:52,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:52,661 INFO L225 Difference]: With dead ends: 198 [2021-05-22 02:22:52,661 INFO L226 Difference]: Without dead ends: 179 [2021-05-22 02:22:52,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 598.9ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:22:52,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-22 02:22:52,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 137. [2021-05-22 02:22:52,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.2058823529411766) internal successors, (300), 136 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:52,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 300 transitions. [2021-05-22 02:22:52,663 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 300 transitions. Word has length 18 [2021-05-22 02:22:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:52,663 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 300 transitions. [2021-05-22 02:22:52,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:52,663 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 300 transitions. [2021-05-22 02:22:52,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:52,663 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:52,664 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:52,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable935 [2021-05-22 02:22:52,864 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:52,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:52,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1335010148, now seen corresponding path program 152 times [2021-05-22 02:22:52,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:52,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6743471] [2021-05-22 02:22:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:53,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:53,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6743471] [2021-05-22 02:22:53,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6743471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:53,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819463469] [2021-05-22 02:22:53,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:53,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:22:53,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:53,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:22:53,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:53,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:53,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819463469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:53,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:53,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:22:53,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266266425] [2021-05-22 02:22:53,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:22:53,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:53,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:22:53,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:22:53,404 INFO L87 Difference]: Start difference. First operand 137 states and 300 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:53,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:53,769 INFO L93 Difference]: Finished difference Result 206 states and 421 transitions. [2021-05-22 02:22:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:22:53,770 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:53,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:53,770 INFO L225 Difference]: With dead ends: 206 [2021-05-22 02:22:53,770 INFO L226 Difference]: Without dead ends: 187 [2021-05-22 02:22:53,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 610.4ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:22:53,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-22 02:22:53,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2021-05-22 02:22:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.210144927536232) internal successors, (305), 138 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:53,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 305 transitions. [2021-05-22 02:22:53,772 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 305 transitions. Word has length 18 [2021-05-22 02:22:53,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:53,772 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 305 transitions. [2021-05-22 02:22:53,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 305 transitions. [2021-05-22 02:22:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:53,772 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:53,772 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:53,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable948,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:53,974 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:53,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:53,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1158851330, now seen corresponding path program 153 times [2021-05-22 02:22:53,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:53,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66818540] [2021-05-22 02:22:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:54,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:54,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66818540] [2021-05-22 02:22:54,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66818540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:54,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357397691] [2021-05-22 02:22:54,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:54,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:22:54,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:54,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:22:54,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:54,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357397691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:54,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:54,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:22:54,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292023042] [2021-05-22 02:22:54,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:22:54,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:54,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:22:54,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:22:54,600 INFO L87 Difference]: Start difference. First operand 139 states and 305 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:55,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:55,117 INFO L93 Difference]: Finished difference Result 172 states and 355 transitions. [2021-05-22 02:22:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:22:55,118 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:55,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:55,118 INFO L225 Difference]: With dead ends: 172 [2021-05-22 02:22:55,118 INFO L226 Difference]: Without dead ends: 165 [2021-05-22 02:22:55,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 839.4ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:22:55,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-22 02:22:55,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2021-05-22 02:22:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.2056737588652484) internal successors, (311), 141 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 311 transitions. [2021-05-22 02:22:55,120 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 311 transitions. Word has length 18 [2021-05-22 02:22:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:55,120 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 311 transitions. [2021-05-22 02:22:55,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:55,120 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 311 transitions. [2021-05-22 02:22:55,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:55,120 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:55,120 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:55,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable960 [2021-05-22 02:22:55,333 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1483162592, now seen corresponding path program 154 times [2021-05-22 02:22:55,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:55,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940784805] [2021-05-22 02:22:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:55,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:55,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940784805] [2021-05-22 02:22:55,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940784805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:55,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869141975] [2021-05-22 02:22:55,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:55,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:22:55,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:55,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:22:55,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:55,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869141975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:55,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:55,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:22:55,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839815496] [2021-05-22 02:22:55,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:22:55,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:55,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:22:55,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:22:55,904 INFO L87 Difference]: Start difference. First operand 142 states and 311 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:56,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:56,669 INFO L93 Difference]: Finished difference Result 179 states and 367 transitions. [2021-05-22 02:22:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:22:56,669 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:56,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:56,670 INFO L225 Difference]: With dead ends: 179 [2021-05-22 02:22:56,670 INFO L226 Difference]: Without dead ends: 172 [2021-05-22 02:22:56,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1011.3ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:22:56,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-22 02:22:56,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 143. [2021-05-22 02:22:56,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.211267605633803) internal successors, (314), 142 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 314 transitions. [2021-05-22 02:22:56,671 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 314 transitions. Word has length 18 [2021-05-22 02:22:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:56,671 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 314 transitions. [2021-05-22 02:22:56,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:56,672 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 314 transitions. [2021-05-22 02:22:56,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:56,672 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:56,672 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:56,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable973 [2021-05-22 02:22:56,877 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:56,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:56,877 INFO L82 PathProgramCache]: Analyzing trace with hash -94179138, now seen corresponding path program 155 times [2021-05-22 02:22:56,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:56,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593987751] [2021-05-22 02:22:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:57,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:57,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:57,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593987751] [2021-05-22 02:22:57,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593987751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:57,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173561558] [2021-05-22 02:22:57,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:57,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:22:57,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:57,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:22:57,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:57,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173561558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:57,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:57,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:22:57,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631311909] [2021-05-22 02:22:57,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:22:57,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:57,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:22:57,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:22:57,517 INFO L87 Difference]: Start difference. First operand 143 states and 314 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:58,420 INFO L93 Difference]: Finished difference Result 193 states and 393 transitions. [2021-05-22 02:22:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:22:58,420 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:58,420 INFO L225 Difference]: With dead ends: 193 [2021-05-22 02:22:58,420 INFO L226 Difference]: Without dead ends: 167 [2021-05-22 02:22:58,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1166.2ms TimeCoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:22:58,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-22 02:22:58,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 143. [2021-05-22 02:22:58,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.2183098591549295) internal successors, (315), 142 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:58,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 315 transitions. [2021-05-22 02:22:58,422 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 315 transitions. Word has length 18 [2021-05-22 02:22:58,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:58,422 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 315 transitions. [2021-05-22 02:22:58,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:58,422 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 315 transitions. [2021-05-22 02:22:58,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:58,422 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:58,422 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:22:58,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable986,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:58,623 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:22:58,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:22:58,623 INFO L82 PathProgramCache]: Analyzing trace with hash -242722746, now seen corresponding path program 156 times [2021-05-22 02:22:58,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:22:58,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883409006] [2021-05-22 02:22:58,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:22:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:22:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:58,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:22:58,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883409006] [2021-05-22 02:22:58,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883409006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:58,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177463632] [2021-05-22 02:22:58,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:22:58,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:22:58,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:22:58,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:22:58,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:22:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:22:59,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177463632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:22:59,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:22:59,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:22:59,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601708955] [2021-05-22 02:22:59,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:22:59,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:22:59,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:22:59,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:22:59,121 INFO L87 Difference]: Start difference. First operand 143 states and 315 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:59,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:22:59,835 INFO L93 Difference]: Finished difference Result 237 states and 471 transitions. [2021-05-22 02:22:59,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:22:59,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:22:59,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:22:59,836 INFO L225 Difference]: With dead ends: 237 [2021-05-22 02:22:59,836 INFO L226 Difference]: Without dead ends: 211 [2021-05-22 02:22:59,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 874.1ms TimeCoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:22:59,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-22 02:22:59,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 141. [2021-05-22 02:22:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.2214285714285715) internal successors, (311), 140 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 311 transitions. [2021-05-22 02:22:59,838 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 311 transitions. Word has length 18 [2021-05-22 02:22:59,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:22:59,838 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 311 transitions. [2021-05-22 02:22:59,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:22:59,838 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 311 transitions. [2021-05-22 02:22:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:22:59,838 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:22:59,838 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:00,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-05-22 02:23:00,045 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:00,045 INFO L82 PathProgramCache]: Analyzing trace with hash -863772573, now seen corresponding path program 157 times [2021-05-22 02:23:00,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:00,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502571236] [2021-05-22 02:23:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:23:00,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:00,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502571236] [2021-05-22 02:23:00,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502571236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:00,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233984397] [2021-05-22 02:23:00,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:00,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:23:00,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:23:00,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233984397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:00,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:00,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:23:00,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424309640] [2021-05-22 02:23:00,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:23:00,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:00,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:23:00,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:00,307 INFO L87 Difference]: Start difference. First operand 141 states and 311 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:00,424 INFO L93 Difference]: Finished difference Result 164 states and 354 transitions. [2021-05-22 02:23:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:23:00,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:00,424 INFO L225 Difference]: With dead ends: 164 [2021-05-22 02:23:00,424 INFO L226 Difference]: Without dead ends: 164 [2021-05-22 02:23:00,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-22 02:23:00,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 141. [2021-05-22 02:23:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.2142857142857144) internal successors, (310), 140 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 310 transitions. [2021-05-22 02:23:00,426 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 310 transitions. Word has length 18 [2021-05-22 02:23:00,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:00,426 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 310 transitions. [2021-05-22 02:23:00,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 310 transitions. [2021-05-22 02:23:00,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:00,426 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:00,426 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:00,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:00,627 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:00,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:00,627 INFO L82 PathProgramCache]: Analyzing trace with hash 263623520, now seen corresponding path program 158 times [2021-05-22 02:23:00,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:00,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455493467] [2021-05-22 02:23:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:00,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:00,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455493467] [2021-05-22 02:23:00,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455493467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:00,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424336411] [2021-05-22 02:23:00,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:00,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:00,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:00,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:00,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:01,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424336411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:01,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:01,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:01,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000166736] [2021-05-22 02:23:01,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:01,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:01,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:01,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:01,130 INFO L87 Difference]: Start difference. First operand 141 states and 310 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:01,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:01,646 INFO L93 Difference]: Finished difference Result 205 states and 413 transitions. [2021-05-22 02:23:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:23:01,647 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:01,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:01,647 INFO L225 Difference]: With dead ends: 205 [2021-05-22 02:23:01,647 INFO L226 Difference]: Without dead ends: 186 [2021-05-22 02:23:01,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 657.1ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:23:01,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-22 02:23:01,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 137. [2021-05-22 02:23:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.198529411764706) internal successors, (299), 136 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:01,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 299 transitions. [2021-05-22 02:23:01,649 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 299 transitions. Word has length 18 [2021-05-22 02:23:01,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:01,649 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 299 transitions. [2021-05-22 02:23:01,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:01,649 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 299 transitions. [2021-05-22 02:23:01,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:01,649 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:01,649 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:01,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-05-22 02:23:01,850 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:01,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:01,850 INFO L82 PathProgramCache]: Analyzing trace with hash -274232058, now seen corresponding path program 159 times [2021-05-22 02:23:01,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:01,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88008352] [2021-05-22 02:23:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:01,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:01,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88008352] [2021-05-22 02:23:02,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88008352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:02,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296440825] [2021-05-22 02:23:02,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:02,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:23:02,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:02,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-22 02:23:02,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:02,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296440825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:02,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:02,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:02,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683572428] [2021-05-22 02:23:02,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:02,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:02,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:02,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:02,388 INFO L87 Difference]: Start difference. First operand 137 states and 299 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:02,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:02,931 INFO L93 Difference]: Finished difference Result 209 states and 427 transitions. [2021-05-22 02:23:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:23:02,932 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:02,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:02,932 INFO L225 Difference]: With dead ends: 209 [2021-05-22 02:23:02,932 INFO L226 Difference]: Without dead ends: 190 [2021-05-22 02:23:02,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 740.7ms TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:23:02,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-22 02:23:02,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 135. [2021-05-22 02:23:02,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.201492537313433) internal successors, (295), 134 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:02,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 295 transitions. [2021-05-22 02:23:02,934 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 295 transitions. Word has length 18 [2021-05-22 02:23:02,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:02,934 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 295 transitions. [2021-05-22 02:23:02,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:02,934 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 295 transitions. [2021-05-22 02:23:02,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:02,934 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:02,934 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:03,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1028,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:03,134 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:03,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:03,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1267484832, now seen corresponding path program 160 times [2021-05-22 02:23:03,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:03,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163778085] [2021-05-22 02:23:03,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:03,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:03,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163778085] [2021-05-22 02:23:03,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163778085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:03,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392222824] [2021-05-22 02:23:03,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:03,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:03,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:03,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:23:03,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:03,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392222824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:03,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:03,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:03,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470896076] [2021-05-22 02:23:03,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:03,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:03,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:03,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:03,679 INFO L87 Difference]: Start difference. First operand 135 states and 295 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:04,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:04,078 INFO L93 Difference]: Finished difference Result 168 states and 346 transitions. [2021-05-22 02:23:04,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:23:04,078 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:04,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:04,078 INFO L225 Difference]: With dead ends: 168 [2021-05-22 02:23:04,078 INFO L226 Difference]: Without dead ends: 161 [2021-05-22 02:23:04,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 658.6ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:23:04,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-22 02:23:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2021-05-22 02:23:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.204379562043796) internal successors, (302), 137 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 302 transitions. [2021-05-22 02:23:04,080 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 302 transitions. Word has length 18 [2021-05-22 02:23:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:04,080 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 302 transitions. [2021-05-22 02:23:04,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:04,080 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 302 transitions. [2021-05-22 02:23:04,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:04,080 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:04,080 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:04,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1040,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:04,281 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:04,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:04,281 INFO L82 PathProgramCache]: Analyzing trace with hash -309856898, now seen corresponding path program 161 times [2021-05-22 02:23:04,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:04,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975211804] [2021-05-22 02:23:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:04,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:04,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975211804] [2021-05-22 02:23:04,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975211804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:04,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60437963] [2021-05-22 02:23:04,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:04,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:23:04,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:04,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:04,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:04,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60437963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:04,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:04,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:04,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749458643] [2021-05-22 02:23:04,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:04,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:04,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:04,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:04,874 INFO L87 Difference]: Start difference. First operand 138 states and 302 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:05,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:05,988 INFO L93 Difference]: Finished difference Result 214 states and 430 transitions. [2021-05-22 02:23:05,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:23:05,989 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:05,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:05,989 INFO L225 Difference]: With dead ends: 214 [2021-05-22 02:23:05,989 INFO L226 Difference]: Without dead ends: 190 [2021-05-22 02:23:05,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1314.6ms TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:23:05,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-22 02:23:05,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2021-05-22 02:23:05,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.2253521126760565) internal successors, (316), 142 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:05,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 316 transitions. [2021-05-22 02:23:05,991 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 316 transitions. Word has length 18 [2021-05-22 02:23:05,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:05,991 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 316 transitions. [2021-05-22 02:23:05,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:05,991 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 316 transitions. [2021-05-22 02:23:05,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:05,991 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:05,991 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:06,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:06,191 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:06,192 INFO L82 PathProgramCache]: Analyzing trace with hash 196489368, now seen corresponding path program 162 times [2021-05-22 02:23:06,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:06,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765356290] [2021-05-22 02:23:06,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:06,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:06,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765356290] [2021-05-22 02:23:06,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765356290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:06,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245393955] [2021-05-22 02:23:06,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:06,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:23:06,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:06,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:06,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:06,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245393955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:06,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:06,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:06,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054229314] [2021-05-22 02:23:06,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:06,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:06,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:06,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:06,702 INFO L87 Difference]: Start difference. First operand 143 states and 316 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:07,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:07,420 INFO L93 Difference]: Finished difference Result 203 states and 416 transitions. [2021-05-22 02:23:07,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:23:07,420 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:07,421 INFO L225 Difference]: With dead ends: 203 [2021-05-22 02:23:07,421 INFO L226 Difference]: Without dead ends: 174 [2021-05-22 02:23:07,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 887.2ms TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:23:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-22 02:23:07,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 144. [2021-05-22 02:23:07,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2237762237762237) internal successors, (318), 143 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 318 transitions. [2021-05-22 02:23:07,422 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 318 transitions. Word has length 18 [2021-05-22 02:23:07,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:07,423 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 318 transitions. [2021-05-22 02:23:07,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:07,423 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 318 transitions. [2021-05-22 02:23:07,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:07,423 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:07,423 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:07,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:07,631 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:07,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:07,632 INFO L82 PathProgramCache]: Analyzing trace with hash 993225120, now seen corresponding path program 163 times [2021-05-22 02:23:07,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:07,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262441709] [2021-05-22 02:23:07,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:07,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:07,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262441709] [2021-05-22 02:23:07,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262441709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:07,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476843312] [2021-05-22 02:23:07,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:07,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:23:07,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:08,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476843312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:08,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:08,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:08,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917883695] [2021-05-22 02:23:08,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:08,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:08,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:08,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:08,151 INFO L87 Difference]: Start difference. First operand 144 states and 318 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:08,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:08,638 INFO L93 Difference]: Finished difference Result 212 states and 438 transitions. [2021-05-22 02:23:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:23:08,639 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:08,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:08,639 INFO L225 Difference]: With dead ends: 212 [2021-05-22 02:23:08,639 INFO L226 Difference]: Without dead ends: 193 [2021-05-22 02:23:08,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 640.9ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:23:08,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-22 02:23:08,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 144. [2021-05-22 02:23:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2237762237762237) internal successors, (318), 143 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 318 transitions. [2021-05-22 02:23:08,641 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 318 transitions. Word has length 18 [2021-05-22 02:23:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:08,641 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 318 transitions. [2021-05-22 02:23:08,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 318 transitions. [2021-05-22 02:23:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:08,641 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:08,641 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:08,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1075 [2021-05-22 02:23:08,842 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:08,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:08,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1286645570, now seen corresponding path program 164 times [2021-05-22 02:23:08,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:08,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252991675] [2021-05-22 02:23:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:09,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:09,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252991675] [2021-05-22 02:23:09,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252991675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:09,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952104593] [2021-05-22 02:23:09,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:09,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:09,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:09,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:09,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:09,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952104593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:09,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:09,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:09,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260396653] [2021-05-22 02:23:09,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:09,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:09,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:09,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:09,384 INFO L87 Difference]: Start difference. First operand 144 states and 318 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:09,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:09,885 INFO L93 Difference]: Finished difference Result 190 states and 394 transitions. [2021-05-22 02:23:09,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:23:09,886 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:09,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:09,886 INFO L225 Difference]: With dead ends: 190 [2021-05-22 02:23:09,886 INFO L226 Difference]: Without dead ends: 172 [2021-05-22 02:23:09,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 729.7ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:23:09,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-22 02:23:09,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 146. [2021-05-22 02:23:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.220689655172414) internal successors, (322), 145 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:09,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 322 transitions. [2021-05-22 02:23:09,888 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 322 transitions. Word has length 18 [2021-05-22 02:23:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:09,888 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 322 transitions. [2021-05-22 02:23:09,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 322 transitions. [2021-05-22 02:23:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:09,888 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:09,888 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:10,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:10,089 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:10,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:10,089 INFO L82 PathProgramCache]: Analyzing trace with hash -489909818, now seen corresponding path program 165 times [2021-05-22 02:23:10,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:10,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171196895] [2021-05-22 02:23:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:10,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:10,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171196895] [2021-05-22 02:23:10,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171196895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:10,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096335017] [2021-05-22 02:23:10,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:10,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:23:10,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:10,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:10,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:10,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096335017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:10,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:10,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:10,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056888044] [2021-05-22 02:23:10,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:10,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:10,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:10,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:10,601 INFO L87 Difference]: Start difference. First operand 146 states and 322 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:11,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:11,293 INFO L93 Difference]: Finished difference Result 217 states and 437 transitions. [2021-05-22 02:23:11,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:23:11,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:11,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:11,294 INFO L225 Difference]: With dead ends: 217 [2021-05-22 02:23:11,294 INFO L226 Difference]: Without dead ends: 188 [2021-05-22 02:23:11,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 896.7ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:23:11,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-22 02:23:11,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 149. [2021-05-22 02:23:11,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.22972972972973) internal successors, (330), 148 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:11,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 330 transitions. [2021-05-22 02:23:11,296 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 330 transitions. Word has length 18 [2021-05-22 02:23:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:11,296 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 330 transitions. [2021-05-22 02:23:11,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:11,296 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 330 transitions. [2021-05-22 02:23:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:11,296 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:11,296 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:11,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:11,501 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:11,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:11,501 INFO L82 PathProgramCache]: Analyzing trace with hash 16436448, now seen corresponding path program 166 times [2021-05-22 02:23:11,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:11,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664277400] [2021-05-22 02:23:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:11,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:11,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664277400] [2021-05-22 02:23:11,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664277400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:11,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988739888] [2021-05-22 02:23:11,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:11,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:11,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:11,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:11,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:12,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988739888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:12,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:12,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:12,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104256359] [2021-05-22 02:23:12,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:12,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:12,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:12,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:12,077 INFO L87 Difference]: Start difference. First operand 149 states and 330 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:12,488 INFO L93 Difference]: Finished difference Result 219 states and 454 transitions. [2021-05-22 02:23:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:23:12,488 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:12,488 INFO L225 Difference]: With dead ends: 219 [2021-05-22 02:23:12,488 INFO L226 Difference]: Without dead ends: 200 [2021-05-22 02:23:12,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 702.3ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:23:12,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-22 02:23:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2021-05-22 02:23:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.2348993288590604) internal successors, (333), 149 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 333 transitions. [2021-05-22 02:23:12,490 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 333 transitions. Word has length 18 [2021-05-22 02:23:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:12,490 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 333 transitions. [2021-05-22 02:23:12,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:12,490 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 333 transitions. [2021-05-22 02:23:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:12,491 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:12,491 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:12,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1108 [2021-05-22 02:23:12,691 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:12,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:12,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1660498388, now seen corresponding path program 167 times [2021-05-22 02:23:12,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:12,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991715553] [2021-05-22 02:23:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:12,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:12,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991715553] [2021-05-22 02:23:12,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991715553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:12,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968539998] [2021-05-22 02:23:12,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:12,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:23:12,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:12,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:12,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:13,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968539998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:13,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:13,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:23:13,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646852262] [2021-05-22 02:23:13,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:23:13,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:13,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:23:13,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:23:13,199 INFO L87 Difference]: Start difference. First operand 150 states and 333 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:13,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:13,696 INFO L93 Difference]: Finished difference Result 170 states and 363 transitions. [2021-05-22 02:23:13,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:23:13,696 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:13,696 INFO L225 Difference]: With dead ends: 170 [2021-05-22 02:23:13,696 INFO L226 Difference]: Without dead ends: 155 [2021-05-22 02:23:13,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 768.1ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:23:13,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-22 02:23:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2021-05-22 02:23:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2317880794701987) internal successors, (337), 151 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 337 transitions. [2021-05-22 02:23:13,698 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 337 transitions. Word has length 18 [2021-05-22 02:23:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:13,698 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 337 transitions. [2021-05-22 02:23:13,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 337 transitions. [2021-05-22 02:23:13,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:13,698 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:13,698 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:13,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1120,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:13,909 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:13,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:13,909 INFO L82 PathProgramCache]: Analyzing trace with hash 7545014, now seen corresponding path program 168 times [2021-05-22 02:23:13,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:13,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026883181] [2021-05-22 02:23:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:14,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026883181] [2021-05-22 02:23:14,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026883181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:14,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144213597] [2021-05-22 02:23:14,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:14,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:23:14,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:14,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:14,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:14,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144213597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:14,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:14,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:23:14,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381765913] [2021-05-22 02:23:14,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:23:14,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:14,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:23:14,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:23:14,541 INFO L87 Difference]: Start difference. First operand 152 states and 337 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:15,027 INFO L93 Difference]: Finished difference Result 169 states and 362 transitions. [2021-05-22 02:23:15,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:23:15,027 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:15,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:15,028 INFO L225 Difference]: With dead ends: 169 [2021-05-22 02:23:15,028 INFO L226 Difference]: Without dead ends: 156 [2021-05-22 02:23:15,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 845.8ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:23:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-22 02:23:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2021-05-22 02:23:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.2302631578947367) internal successors, (339), 152 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 339 transitions. [2021-05-22 02:23:15,029 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 339 transitions. Word has length 18 [2021-05-22 02:23:15,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:15,030 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 339 transitions. [2021-05-22 02:23:15,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:15,030 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 339 transitions. [2021-05-22 02:23:15,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:15,030 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:15,030 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:15,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:15,237 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:15,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:15,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1569796716, now seen corresponding path program 169 times [2021-05-22 02:23:15,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:15,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574379675] [2021-05-22 02:23:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:15,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:15,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574379675] [2021-05-22 02:23:15,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574379675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:15,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888491184] [2021-05-22 02:23:15,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:15,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:23:15,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:15,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888491184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:15,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:15,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:23:15,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287984098] [2021-05-22 02:23:15,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:23:15,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:15,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:23:15,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:23:15,843 INFO L87 Difference]: Start difference. First operand 153 states and 339 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:17,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:17,186 INFO L93 Difference]: Finished difference Result 226 states and 453 transitions. [2021-05-22 02:23:17,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:23:17,187 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:17,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:17,187 INFO L225 Difference]: With dead ends: 226 [2021-05-22 02:23:17,187 INFO L226 Difference]: Without dead ends: 201 [2021-05-22 02:23:17,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1609.5ms TimeCoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:23:17,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-22 02:23:17,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 152. [2021-05-22 02:23:17,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.2317880794701987) internal successors, (337), 151 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:17,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 337 transitions. [2021-05-22 02:23:17,189 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 337 transitions. Word has length 18 [2021-05-22 02:23:17,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:17,189 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 337 transitions. [2021-05-22 02:23:17,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 337 transitions. [2021-05-22 02:23:17,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:17,189 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:17,189 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:17,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:17,390 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:17,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:17,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1475589924, now seen corresponding path program 170 times [2021-05-22 02:23:17,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:17,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393310061] [2021-05-22 02:23:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:17,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:17,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:17,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393310061] [2021-05-22 02:23:17,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393310061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:17,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644588638] [2021-05-22 02:23:17,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:17,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:17,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:17,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:17,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:17,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644588638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:17,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:17,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:17,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915331731] [2021-05-22 02:23:17,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:17,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:17,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:17,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:17,950 INFO L87 Difference]: Start difference. First operand 152 states and 337 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:18,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:18,249 INFO L93 Difference]: Finished difference Result 170 states and 364 transitions. [2021-05-22 02:23:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:23:18,249 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:18,250 INFO L225 Difference]: With dead ends: 170 [2021-05-22 02:23:18,250 INFO L226 Difference]: Without dead ends: 157 [2021-05-22 02:23:18,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 598.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:23:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-22 02:23:18,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2021-05-22 02:23:18,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.2287581699346406) internal successors, (341), 153 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:18,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 341 transitions. [2021-05-22 02:23:18,251 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 341 transitions. Word has length 18 [2021-05-22 02:23:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:18,252 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 341 transitions. [2021-05-22 02:23:18,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:18,252 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 341 transitions. [2021-05-22 02:23:18,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:18,252 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:18,252 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:18,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1152,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:18,461 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:18,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:18,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1242035642, now seen corresponding path program 171 times [2021-05-22 02:23:18,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:18,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852315872] [2021-05-22 02:23:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:18,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:18,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:18,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:18,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852315872] [2021-05-22 02:23:18,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852315872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:18,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757687175] [2021-05-22 02:23:18,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:18,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:23:18,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:18,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:23:18,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:19,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757687175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:19,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:19,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:19,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689906176] [2021-05-22 02:23:19,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:19,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:19,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:19,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:19,018 INFO L87 Difference]: Start difference. First operand 154 states and 341 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:19,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:19,875 INFO L93 Difference]: Finished difference Result 202 states and 418 transitions. [2021-05-22 02:23:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:23:19,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:19,876 INFO L225 Difference]: With dead ends: 202 [2021-05-22 02:23:19,876 INFO L226 Difference]: Without dead ends: 181 [2021-05-22 02:23:19,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1048.1ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:23:19,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-22 02:23:19,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2021-05-22 02:23:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2337662337662336) internal successors, (344), 154 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:19,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 344 transitions. [2021-05-22 02:23:19,878 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 344 transitions. Word has length 18 [2021-05-22 02:23:19,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:19,878 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 344 transitions. [2021-05-22 02:23:19,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:19,878 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 344 transitions. [2021-05-22 02:23:19,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:19,878 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:19,878 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:20,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:20,078 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:20,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:20,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1955577145, now seen corresponding path program 172 times [2021-05-22 02:23:20,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:20,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114536928] [2021-05-22 02:23:20,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:23:20,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:20,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114536928] [2021-05-22 02:23:20,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114536928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:20,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817007650] [2021-05-22 02:23:20,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:20,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:20,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:20,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:23:20,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:23:20,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817007650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:20,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:20,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:23:20,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520363441] [2021-05-22 02:23:20,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:23:20,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:20,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:23:20,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:20,306 INFO L87 Difference]: Start difference. First operand 155 states and 344 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:20,592 INFO L93 Difference]: Finished difference Result 186 states and 405 transitions. [2021-05-22 02:23:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:23:20,592 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:20,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:20,593 INFO L225 Difference]: With dead ends: 186 [2021-05-22 02:23:20,593 INFO L226 Difference]: Without dead ends: 186 [2021-05-22 02:23:20,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 313.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:23:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-22 02:23:20,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 155. [2021-05-22 02:23:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2337662337662336) internal successors, (344), 154 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 344 transitions. [2021-05-22 02:23:20,594 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 344 transitions. Word has length 18 [2021-05-22 02:23:20,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:20,594 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 344 transitions. [2021-05-22 02:23:20,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:20,595 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 344 transitions. [2021-05-22 02:23:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:20,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:20,595 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:20,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-05-22 02:23:20,796 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:20,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1748381908, now seen corresponding path program 173 times [2021-05-22 02:23:20,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:20,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904073839] [2021-05-22 02:23:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:20,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:20,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904073839] [2021-05-22 02:23:20,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904073839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:20,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202088333] [2021-05-22 02:23:20,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:20,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:23:20,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:20,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:20,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:21,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202088333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:21,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:21,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:21,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146910285] [2021-05-22 02:23:21,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:21,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:21,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:21,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:21,271 INFO L87 Difference]: Start difference. First operand 155 states and 344 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:21,834 INFO L93 Difference]: Finished difference Result 212 states and 446 transitions. [2021-05-22 02:23:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:23:21,834 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:21,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:21,834 INFO L225 Difference]: With dead ends: 212 [2021-05-22 02:23:21,834 INFO L226 Difference]: Without dead ends: 192 [2021-05-22 02:23:21,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 731.9ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:23:21,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-22 02:23:21,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 157. [2021-05-22 02:23:21,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.230769230769231) internal successors, (348), 156 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 348 transitions. [2021-05-22 02:23:21,836 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 348 transitions. Word has length 18 [2021-05-22 02:23:21,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:21,836 INFO L482 AbstractCegarLoop]: Abstraction has 157 states and 348 transitions. [2021-05-22 02:23:21,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:21,836 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 348 transitions. [2021-05-22 02:23:21,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:21,837 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:21,837 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:22,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1181,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:22,037 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:22,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:22,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1211994058, now seen corresponding path program 174 times [2021-05-22 02:23:22,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:22,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742270033] [2021-05-22 02:23:22,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:22,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742270033] [2021-05-22 02:23:22,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742270033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:22,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787718357] [2021-05-22 02:23:22,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:22,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:23:22,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:22,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:23:22,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:22,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787718357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:22,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:22,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:22,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468794678] [2021-05-22 02:23:22,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:22,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:22,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:22,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:22,484 INFO L87 Difference]: Start difference. First operand 157 states and 348 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:23,141 INFO L93 Difference]: Finished difference Result 221 states and 456 transitions. [2021-05-22 02:23:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:23:23,143 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:23,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:23,143 INFO L225 Difference]: With dead ends: 221 [2021-05-22 02:23:23,143 INFO L226 Difference]: Without dead ends: 200 [2021-05-22 02:23:23,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 800.5ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:23:23,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-22 02:23:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 159. [2021-05-22 02:23:23,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2341772151898733) internal successors, (353), 158 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 353 transitions. [2021-05-22 02:23:23,145 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 353 transitions. Word has length 18 [2021-05-22 02:23:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:23,145 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 353 transitions. [2021-05-22 02:23:23,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 353 transitions. [2021-05-22 02:23:23,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:23,145 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:23,145 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:23,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1192,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:23,346 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:23,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:23,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1749849636, now seen corresponding path program 175 times [2021-05-22 02:23:23,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:23,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662963415] [2021-05-22 02:23:23,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:23,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662963415] [2021-05-22 02:23:23,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662963415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:23,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209205130] [2021-05-22 02:23:23,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:23,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:23,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:23,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209205130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:23,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:23,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:23,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074089512] [2021-05-22 02:23:23,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:23,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:23,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:23,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:23,870 INFO L87 Difference]: Start difference. First operand 159 states and 353 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:24,319 INFO L93 Difference]: Finished difference Result 222 states and 464 transitions. [2021-05-22 02:23:24,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:23:24,320 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:24,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:24,320 INFO L225 Difference]: With dead ends: 222 [2021-05-22 02:23:24,320 INFO L226 Difference]: Without dead ends: 203 [2021-05-22 02:23:24,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 607.4ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:23:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-22 02:23:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 159. [2021-05-22 02:23:24,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2341772151898733) internal successors, (353), 158 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 353 transitions. [2021-05-22 02:23:24,322 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 353 transitions. Word has length 18 [2021-05-22 02:23:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:24,322 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 353 transitions. [2021-05-22 02:23:24,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 353 transitions. [2021-05-22 02:23:24,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:24,322 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:24,322 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:24,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1204 [2021-05-22 02:23:24,523 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:24,523 INFO L82 PathProgramCache]: Analyzing trace with hash -208132746, now seen corresponding path program 176 times [2021-05-22 02:23:24,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:24,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747466815] [2021-05-22 02:23:24,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:24,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:24,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747466815] [2021-05-22 02:23:24,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747466815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:24,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214800748] [2021-05-22 02:23:24,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:24,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:24,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:24,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:24,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214800748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:25,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:25,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:25,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723649405] [2021-05-22 02:23:25,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:25,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:25,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:25,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:25,072 INFO L87 Difference]: Start difference. First operand 159 states and 353 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:25,362 INFO L93 Difference]: Finished difference Result 177 states and 380 transitions. [2021-05-22 02:23:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:23:25,362 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:25,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:25,362 INFO L225 Difference]: With dead ends: 177 [2021-05-22 02:23:25,362 INFO L226 Difference]: Without dead ends: 164 [2021-05-22 02:23:25,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 589.5ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:23:25,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-22 02:23:25,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2021-05-22 02:23:25,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.23125) internal successors, (357), 160 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 357 transitions. [2021-05-22 02:23:25,364 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 357 transitions. Word has length 18 [2021-05-22 02:23:25,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:25,364 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 357 transitions. [2021-05-22 02:23:25,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 357 transitions. [2021-05-22 02:23:25,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:25,365 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:25,365 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:25,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1216,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:25,565 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:25,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:25,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1785474476, now seen corresponding path program 177 times [2021-05-22 02:23:25,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:25,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392188460] [2021-05-22 02:23:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:25,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:25,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392188460] [2021-05-22 02:23:25,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392188460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:25,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148049147] [2021-05-22 02:23:25,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:25,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:23:25,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:25,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-22 02:23:25,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:26,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148049147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:26,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:26,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:26,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910554782] [2021-05-22 02:23:26,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:26,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:26,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:26,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:26,149 INFO L87 Difference]: Start difference. First operand 161 states and 357 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:26,822 INFO L93 Difference]: Finished difference Result 216 states and 440 transitions. [2021-05-22 02:23:26,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:23:26,822 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:26,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:26,822 INFO L225 Difference]: With dead ends: 216 [2021-05-22 02:23:26,822 INFO L226 Difference]: Without dead ends: 184 [2021-05-22 02:23:26,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 942.5ms TimeCoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:23:26,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-22 02:23:26,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 160. [2021-05-22 02:23:26,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2327044025157234) internal successors, (355), 159 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 355 transitions. [2021-05-22 02:23:26,824 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 355 transitions. Word has length 18 [2021-05-22 02:23:26,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:26,824 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 355 transitions. [2021-05-22 02:23:26,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:26,824 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 355 transitions. [2021-05-22 02:23:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:26,824 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:26,824 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:27,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1227 [2021-05-22 02:23:27,025 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:27,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:27,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1279128210, now seen corresponding path program 178 times [2021-05-22 02:23:27,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:27,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588067180] [2021-05-22 02:23:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:27,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588067180] [2021-05-22 02:23:27,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588067180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:27,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379034530] [2021-05-22 02:23:27,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:27,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:27,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:27,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:27,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:27,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379034530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:27,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:27,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:27,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444930443] [2021-05-22 02:23:27,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:27,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:27,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:27,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:27,583 INFO L87 Difference]: Start difference. First operand 160 states and 355 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:28,429 INFO L93 Difference]: Finished difference Result 228 states and 475 transitions. [2021-05-22 02:23:28,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:23:28,429 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:28,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:28,430 INFO L225 Difference]: With dead ends: 228 [2021-05-22 02:23:28,430 INFO L226 Difference]: Without dead ends: 210 [2021-05-22 02:23:28,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1127.3ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:23:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-22 02:23:28,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2021-05-22 02:23:28,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.2439024390243905) internal successors, (368), 164 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 368 transitions. [2021-05-22 02:23:28,431 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 368 transitions. Word has length 18 [2021-05-22 02:23:28,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:28,432 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 368 transitions. [2021-05-22 02:23:28,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:28,432 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 368 transitions. [2021-05-22 02:23:28,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:28,432 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:28,432 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:28,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1238,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:28,643 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:28,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:28,643 INFO L82 PathProgramCache]: Analyzing trace with hash 55463120, now seen corresponding path program 179 times [2021-05-22 02:23:28,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:28,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677010531] [2021-05-22 02:23:28,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:28,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:28,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677010531] [2021-05-22 02:23:28,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677010531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:28,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600352384] [2021-05-22 02:23:28,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:28,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:23:28,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:28,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:28,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:29,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600352384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:29,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:29,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:29,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666412896] [2021-05-22 02:23:29,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:29,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:29,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:29,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:29,105 INFO L87 Difference]: Start difference. First operand 165 states and 368 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:29,773 INFO L93 Difference]: Finished difference Result 227 states and 468 transitions. [2021-05-22 02:23:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:23:29,773 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:29,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:29,773 INFO L225 Difference]: With dead ends: 227 [2021-05-22 02:23:29,773 INFO L226 Difference]: Without dead ends: 208 [2021-05-22 02:23:29,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 820.9ms TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:23:29,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-22 02:23:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 161. [2021-05-22 02:23:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.23125) internal successors, (357), 160 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 357 transitions. [2021-05-22 02:23:29,775 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 357 transitions. Word has length 18 [2021-05-22 02:23:29,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:29,775 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 357 transitions. [2021-05-22 02:23:29,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:29,775 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 357 transitions. [2021-05-22 02:23:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:29,775 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:29,776 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:29,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1249,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:29,976 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:29,976 INFO L82 PathProgramCache]: Analyzing trace with hash -482392458, now seen corresponding path program 180 times [2021-05-22 02:23:29,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:29,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310193969] [2021-05-22 02:23:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:30,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:30,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310193969] [2021-05-22 02:23:30,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310193969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:30,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853162344] [2021-05-22 02:23:30,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:30,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:23:30,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:30,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:30,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:30,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853162344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:30,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:30,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:30,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190976958] [2021-05-22 02:23:30,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:30,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:30,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:30,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:30,532 INFO L87 Difference]: Start difference. First operand 161 states and 357 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:30,948 INFO L93 Difference]: Finished difference Result 224 states and 468 transitions. [2021-05-22 02:23:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:23:30,949 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:30,949 INFO L225 Difference]: With dead ends: 224 [2021-05-22 02:23:30,949 INFO L226 Difference]: Without dead ends: 205 [2021-05-22 02:23:30,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 633.5ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:23:30,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-22 02:23:30,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 160. [2021-05-22 02:23:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.2327044025157234) internal successors, (355), 159 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 355 transitions. [2021-05-22 02:23:30,951 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 355 transitions. Word has length 18 [2021-05-22 02:23:30,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:30,951 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 355 transitions. [2021-05-22 02:23:30,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:30,951 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 355 transitions. [2021-05-22 02:23:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:30,951 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:30,951 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:31,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1262,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:31,152 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:31,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:31,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1532704148, now seen corresponding path program 181 times [2021-05-22 02:23:31,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:31,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106514695] [2021-05-22 02:23:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:31,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:31,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106514695] [2021-05-22 02:23:31,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106514695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:31,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786638503] [2021-05-22 02:23:31,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:31,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:31,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:31,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786638503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:31,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:31,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:31,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480121322] [2021-05-22 02:23:31,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:31,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:31,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:31,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:31,701 INFO L87 Difference]: Start difference. First operand 160 states and 355 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:32,399 INFO L93 Difference]: Finished difference Result 218 states and 444 transitions. [2021-05-22 02:23:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:23:32,399 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:32,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:32,399 INFO L225 Difference]: With dead ends: 218 [2021-05-22 02:23:32,399 INFO L226 Difference]: Without dead ends: 186 [2021-05-22 02:23:32,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 918.0ms TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:23:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-22 02:23:32,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 161. [2021-05-22 02:23:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2375) internal successors, (358), 160 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 358 transitions. [2021-05-22 02:23:32,401 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 358 transitions. Word has length 18 [2021-05-22 02:23:32,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:32,401 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 358 transitions. [2021-05-22 02:23:32,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 358 transitions. [2021-05-22 02:23:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:32,401 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:32,401 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:32,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:32,602 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:32,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:32,602 INFO L82 PathProgramCache]: Analyzing trace with hash -2078756465, now seen corresponding path program 182 times [2021-05-22 02:23:32,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:32,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116278020] [2021-05-22 02:23:32,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:23:32,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:32,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116278020] [2021-05-22 02:23:32,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116278020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:32,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326353624] [2021-05-22 02:23:32,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:32,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:32,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:32,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:23:32,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:23:32,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326353624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:32,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:32,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:23:32,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620028396] [2021-05-22 02:23:32,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:23:32,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:32,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:23:32,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:23:32,914 INFO L87 Difference]: Start difference. First operand 161 states and 358 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:33,004 INFO L93 Difference]: Finished difference Result 170 states and 372 transitions. [2021-05-22 02:23:33,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:23:33,005 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:33,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:33,005 INFO L225 Difference]: With dead ends: 170 [2021-05-22 02:23:33,005 INFO L226 Difference]: Without dead ends: 170 [2021-05-22 02:23:33,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-22 02:23:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-22 02:23:33,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 159. [2021-05-22 02:23:33,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-05-22 02:23:33,007 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-05-22 02:23:33,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:33,007 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-05-22 02:23:33,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:33,007 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-05-22 02:23:33,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:33,007 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:33,007 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:33,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:33,208 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:33,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1965527396, now seen corresponding path program 183 times [2021-05-22 02:23:33,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:33,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292772405] [2021-05-22 02:23:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:33,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292772405] [2021-05-22 02:23:33,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292772405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:33,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904358385] [2021-05-22 02:23:33,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:33,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:23:33,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:33,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:33,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:33,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904358385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:33,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:33,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:33,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496822767] [2021-05-22 02:23:33,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:33,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:33,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:33,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:33,772 INFO L87 Difference]: Start difference. First operand 159 states and 351 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:34,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:34,211 INFO L93 Difference]: Finished difference Result 222 states and 462 transitions. [2021-05-22 02:23:34,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:23:34,211 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:34,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:34,211 INFO L225 Difference]: With dead ends: 222 [2021-05-22 02:23:34,211 INFO L226 Difference]: Without dead ends: 203 [2021-05-22 02:23:34,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 681.3ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:23:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-22 02:23:34,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 159. [2021-05-22 02:23:34,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-05-22 02:23:34,213 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-05-22 02:23:34,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:34,213 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-05-22 02:23:34,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:34,213 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-05-22 02:23:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:34,213 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:34,214 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:34,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:34,429 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:34,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1459181130, now seen corresponding path program 184 times [2021-05-22 02:23:34,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:34,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496434130] [2021-05-22 02:23:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:34,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:34,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496434130] [2021-05-22 02:23:34,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496434130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:34,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812778368] [2021-05-22 02:23:34,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:34,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:34,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:34,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:23:34,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:34,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812778368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:34,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:34,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:34,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292574978] [2021-05-22 02:23:34,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:34,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:34,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:34,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:34,958 INFO L87 Difference]: Start difference. First operand 159 states and 351 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:35,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:35,454 INFO L93 Difference]: Finished difference Result 226 states and 470 transitions. [2021-05-22 02:23:35,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:23:35,454 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:35,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:35,455 INFO L225 Difference]: With dead ends: 226 [2021-05-22 02:23:35,455 INFO L226 Difference]: Without dead ends: 207 [2021-05-22 02:23:35,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 683.5ms TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:23:35,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-22 02:23:35,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 159. [2021-05-22 02:23:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.221518987341772) internal successors, (351), 158 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:35,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 351 transitions. [2021-05-22 02:23:35,457 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 351 transitions. Word has length 18 [2021-05-22 02:23:35,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:35,457 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 351 transitions. [2021-05-22 02:23:35,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:35,457 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 351 transitions. [2021-05-22 02:23:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:35,457 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:35,457 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:35,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1303 [2021-05-22 02:23:35,672 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:35,672 INFO L82 PathProgramCache]: Analyzing trace with hash 428334108, now seen corresponding path program 185 times [2021-05-22 02:23:35,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:35,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256349853] [2021-05-22 02:23:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:35,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:35,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256349853] [2021-05-22 02:23:35,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256349853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:35,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327551195] [2021-05-22 02:23:35,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:35,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:23:35,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:35,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:23:35,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:36,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327551195] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:36,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:36,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:36,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67393752] [2021-05-22 02:23:36,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:36,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:36,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:36,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:36,170 INFO L87 Difference]: Start difference. First operand 159 states and 351 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:36,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:36,930 INFO L93 Difference]: Finished difference Result 207 states and 433 transitions. [2021-05-22 02:23:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:23:36,930 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:36,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:36,931 INFO L225 Difference]: With dead ends: 207 [2021-05-22 02:23:36,931 INFO L226 Difference]: Without dead ends: 200 [2021-05-22 02:23:36,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 917.3ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:23:36,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-22 02:23:36,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 161. [2021-05-22 02:23:36,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.225) internal successors, (356), 160 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:36,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 356 transitions. [2021-05-22 02:23:36,933 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 356 transitions. Word has length 18 [2021-05-22 02:23:36,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:36,933 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 356 transitions. [2021-05-22 02:23:36,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:36,933 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 356 transitions. [2021-05-22 02:23:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:36,933 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:36,933 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:37,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1314,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:37,137 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:37,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:37,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1149007622, now seen corresponding path program 186 times [2021-05-22 02:23:37,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:37,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609873822] [2021-05-22 02:23:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:37,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:37,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609873822] [2021-05-22 02:23:37,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609873822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:37,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928140735] [2021-05-22 02:23:37,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:37,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:23:37,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:37,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:37,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:37,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928140735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:37,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:37,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:37,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88513700] [2021-05-22 02:23:37,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:37,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:37,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:37,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:37,673 INFO L87 Difference]: Start difference. First operand 161 states and 356 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:39,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:39,259 INFO L93 Difference]: Finished difference Result 266 states and 523 transitions. [2021-05-22 02:23:39,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:23:39,260 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:39,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:39,260 INFO L225 Difference]: With dead ends: 266 [2021-05-22 02:23:39,260 INFO L226 Difference]: Without dead ends: 228 [2021-05-22 02:23:39,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1656.9ms TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:23:39,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-22 02:23:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 164. [2021-05-22 02:23:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.2392638036809815) internal successors, (365), 163 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 365 transitions. [2021-05-22 02:23:39,262 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 365 transitions. Word has length 18 [2021-05-22 02:23:39,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:39,262 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 365 transitions. [2021-05-22 02:23:39,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:39,262 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 365 transitions. [2021-05-22 02:23:39,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:39,263 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:39,263 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:39,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:39,463 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:39,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:39,463 INFO L82 PathProgramCache]: Analyzing trace with hash -642661356, now seen corresponding path program 187 times [2021-05-22 02:23:39,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:39,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26776684] [2021-05-22 02:23:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:39,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:39,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:39,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26776684] [2021-05-22 02:23:39,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26776684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:39,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672027279] [2021-05-22 02:23:39,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:39,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:23:39,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:39,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672027279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:39,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:39,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:39,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5590630] [2021-05-22 02:23:39,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:39,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:39,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:39,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:39,997 INFO L87 Difference]: Start difference. First operand 164 states and 365 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:40,905 INFO L93 Difference]: Finished difference Result 228 states and 469 transitions. [2021-05-22 02:23:40,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:23:40,906 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:40,906 INFO L225 Difference]: With dead ends: 228 [2021-05-22 02:23:40,906 INFO L226 Difference]: Without dead ends: 203 [2021-05-22 02:23:40,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1020.7ms TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:23:40,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-22 02:23:40,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 165. [2021-05-22 02:23:40,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.2378048780487805) internal successors, (367), 164 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 367 transitions. [2021-05-22 02:23:40,908 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 367 transitions. Word has length 18 [2021-05-22 02:23:40,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:40,908 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 367 transitions. [2021-05-22 02:23:40,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:40,908 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 367 transitions. [2021-05-22 02:23:40,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:40,908 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:40,908 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:41,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1338 [2021-05-22 02:23:41,109 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:41,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:41,109 INFO L82 PathProgramCache]: Analyzing trace with hash 154074396, now seen corresponding path program 188 times [2021-05-22 02:23:41,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:41,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673370111] [2021-05-22 02:23:41,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:41,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:41,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673370111] [2021-05-22 02:23:41,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673370111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:41,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234601864] [2021-05-22 02:23:41,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:41,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:41,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:41,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:41,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234601864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:41,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:41,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:41,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954584796] [2021-05-22 02:23:41,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:41,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:41,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:41,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:41,662 INFO L87 Difference]: Start difference. First operand 165 states and 367 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:42,137 INFO L93 Difference]: Finished difference Result 233 states and 476 transitions. [2021-05-22 02:23:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:23:42,137 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:42,138 INFO L225 Difference]: With dead ends: 233 [2021-05-22 02:23:42,138 INFO L226 Difference]: Without dead ends: 211 [2021-05-22 02:23:42,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 662.5ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:23:42,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-22 02:23:42,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 166. [2021-05-22 02:23:42,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.2363636363636363) internal successors, (369), 165 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 369 transitions. [2021-05-22 02:23:42,140 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 369 transitions. Word has length 18 [2021-05-22 02:23:42,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:42,140 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 369 transitions. [2021-05-22 02:23:42,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:42,140 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 369 transitions. [2021-05-22 02:23:42,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:42,140 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:42,140 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:42,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1351,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:42,352 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:42,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2125796294, now seen corresponding path program 189 times [2021-05-22 02:23:42,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:42,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737466001] [2021-05-22 02:23:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:42,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:42,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737466001] [2021-05-22 02:23:42,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737466001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:42,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445653544] [2021-05-22 02:23:42,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:42,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:23:42,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:42,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-22 02:23:42,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:42,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445653544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:42,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:42,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:42,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744825034] [2021-05-22 02:23:42,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:42,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:42,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:42,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:42,884 INFO L87 Difference]: Start difference. First operand 166 states and 369 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:43,561 INFO L93 Difference]: Finished difference Result 223 states and 456 transitions. [2021-05-22 02:23:43,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:23:43,561 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:43,562 INFO L225 Difference]: With dead ends: 223 [2021-05-22 02:23:43,562 INFO L226 Difference]: Without dead ends: 191 [2021-05-22 02:23:43,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 867.5ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:23:43,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-22 02:23:43,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 168. [2021-05-22 02:23:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2335329341317367) internal successors, (373), 167 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:43,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 373 transitions. [2021-05-22 02:23:43,564 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 373 transitions. Word has length 18 [2021-05-22 02:23:43,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:43,564 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 373 transitions. [2021-05-22 02:23:43,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:43,564 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 373 transitions. [2021-05-22 02:23:43,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:43,564 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:43,564 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:43,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-05-22 02:23:43,764 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:43,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:43,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1329060542, now seen corresponding path program 190 times [2021-05-22 02:23:43,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:43,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581586682] [2021-05-22 02:23:43,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:43,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:43,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581586682] [2021-05-22 02:23:43,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581586682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:43,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187418393] [2021-05-22 02:23:43,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:43,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:43,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:43,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:43,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:44,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187418393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:44,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:44,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:44,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554751534] [2021-05-22 02:23:44,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:44,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:44,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:44,305 INFO L87 Difference]: Start difference. First operand 168 states and 373 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:44,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:44,920 INFO L93 Difference]: Finished difference Result 235 states and 480 transitions. [2021-05-22 02:23:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:23:44,921 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:44,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:44,921 INFO L225 Difference]: With dead ends: 235 [2021-05-22 02:23:44,921 INFO L226 Difference]: Without dead ends: 213 [2021-05-22 02:23:44,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 784.9ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:23:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-22 02:23:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-05-22 02:23:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.2349397590361444) internal successors, (371), 166 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 371 transitions. [2021-05-22 02:23:44,923 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 371 transitions. Word has length 18 [2021-05-22 02:23:44,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:44,923 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 371 transitions. [2021-05-22 02:23:44,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 371 transitions. [2021-05-22 02:23:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:44,923 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:44,924 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:45,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-05-22 02:23:45,140 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:45,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:45,140 INFO L82 PathProgramCache]: Analyzing trace with hash -822714276, now seen corresponding path program 191 times [2021-05-22 02:23:45,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:45,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327608148] [2021-05-22 02:23:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:45,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:45,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327608148] [2021-05-22 02:23:45,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327608148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:45,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090200277] [2021-05-22 02:23:45,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:45,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:23:45,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:45,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:45,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:45,562 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-22 02:23:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:45,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090200277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:45,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:45,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:45,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297933626] [2021-05-22 02:23:45,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:45,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:45,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:45,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:45,742 INFO L87 Difference]: Start difference. First operand 167 states and 371 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:46,384 INFO L93 Difference]: Finished difference Result 239 states and 488 transitions. [2021-05-22 02:23:46,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:23:46,385 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:46,401 INFO L225 Difference]: With dead ends: 239 [2021-05-22 02:23:46,401 INFO L226 Difference]: Without dead ends: 214 [2021-05-22 02:23:46,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 888.9ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:23:46,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-22 02:23:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 168. [2021-05-22 02:23:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.2335329341317367) internal successors, (373), 167 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 373 transitions. [2021-05-22 02:23:46,403 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 373 transitions. Word has length 18 [2021-05-22 02:23:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:46,403 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 373 transitions. [2021-05-22 02:23:46,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 373 transitions. [2021-05-22 02:23:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:46,403 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:46,403 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:46,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-05-22 02:23:46,604 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:46,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:46,604 INFO L82 PathProgramCache]: Analyzing trace with hash -858339116, now seen corresponding path program 192 times [2021-05-22 02:23:46,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:46,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317194701] [2021-05-22 02:23:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:46,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:46,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317194701] [2021-05-22 02:23:46,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317194701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:46,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631171814] [2021-05-22 02:23:46,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:46,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:23:46,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:46,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:23:46,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:47,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631171814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:47,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:47,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:47,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815009116] [2021-05-22 02:23:47,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:47,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:47,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:47,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:47,155 INFO L87 Difference]: Start difference. First operand 168 states and 373 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:48,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:48,003 INFO L93 Difference]: Finished difference Result 222 states and 462 transitions. [2021-05-22 02:23:48,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:23:48,004 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:48,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:48,004 INFO L225 Difference]: With dead ends: 222 [2021-05-22 02:23:48,004 INFO L226 Difference]: Without dead ends: 197 [2021-05-22 02:23:48,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1032.9ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:23:48,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-22 02:23:48,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 171. [2021-05-22 02:23:48,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2294117647058824) internal successors, (379), 170 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 379 transitions. [2021-05-22 02:23:48,006 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 379 transitions. Word has length 18 [2021-05-22 02:23:48,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:48,006 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 379 transitions. [2021-05-22 02:23:48,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:48,006 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 379 transitions. [2021-05-22 02:23:48,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:48,006 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:48,007 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:48,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1398 [2021-05-22 02:23:48,207 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:48,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:48,207 INFO L82 PathProgramCache]: Analyzing trace with hash -61603364, now seen corresponding path program 193 times [2021-05-22 02:23:48,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:48,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781692629] [2021-05-22 02:23:48,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:48,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:48,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781692629] [2021-05-22 02:23:48,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781692629] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:48,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161656019] [2021-05-22 02:23:48,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:48,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:48,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:48,716 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-22 02:23:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:48,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161656019] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:48,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:48,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:48,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284198598] [2021-05-22 02:23:48,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:48,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:48,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:48,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:48,865 INFO L87 Difference]: Start difference. First operand 171 states and 379 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:49,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:49,483 INFO L93 Difference]: Finished difference Result 238 states and 486 transitions. [2021-05-22 02:23:49,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:23:49,483 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:49,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:49,484 INFO L225 Difference]: With dead ends: 238 [2021-05-22 02:23:49,484 INFO L226 Difference]: Without dead ends: 216 [2021-05-22 02:23:49,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 836.5ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:23:49,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-22 02:23:49,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 170. [2021-05-22 02:23:49,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.230769230769231) internal successors, (377), 169 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:49,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 377 transitions. [2021-05-22 02:23:49,486 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 377 transitions. Word has length 18 [2021-05-22 02:23:49,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:49,486 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 377 transitions. [2021-05-22 02:23:49,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:49,486 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 377 transitions. [2021-05-22 02:23:49,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:49,486 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:49,486 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:49,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-05-22 02:23:49,686 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:49,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:49,687 INFO L82 PathProgramCache]: Analyzing trace with hash 444742902, now seen corresponding path program 194 times [2021-05-22 02:23:49,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:49,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698773892] [2021-05-22 02:23:49,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:49,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:49,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698773892] [2021-05-22 02:23:49,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698773892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:49,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321070566] [2021-05-22 02:23:49,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:49,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:49,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:49,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:49,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:50,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321070566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:50,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:50,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:50,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273801244] [2021-05-22 02:23:50,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:50,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:50,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:50,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:50,230 INFO L87 Difference]: Start difference. First operand 170 states and 377 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:50,823 INFO L93 Difference]: Finished difference Result 240 states and 490 transitions. [2021-05-22 02:23:50,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:23:50,823 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:50,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:50,824 INFO L225 Difference]: With dead ends: 240 [2021-05-22 02:23:50,824 INFO L226 Difference]: Without dead ends: 215 [2021-05-22 02:23:50,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:23:50,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-22 02:23:50,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 169. [2021-05-22 02:23:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.232142857142857) internal successors, (375), 168 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:50,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 375 transitions. [2021-05-22 02:23:50,826 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 375 transitions. Word has length 18 [2021-05-22 02:23:50,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:50,826 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 375 transitions. [2021-05-22 02:23:50,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:50,826 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 375 transitions. [2021-05-22 02:23:50,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:50,826 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:50,826 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:51,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1423 [2021-05-22 02:23:51,026 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:51,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:51,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1038392036, now seen corresponding path program 195 times [2021-05-22 02:23:51,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:51,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491184543] [2021-05-22 02:23:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:51,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:51,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491184543] [2021-05-22 02:23:51,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491184543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:51,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822819808] [2021-05-22 02:23:51,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:51,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:23:51,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:51,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-22 02:23:51,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:51,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822819808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:51,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:51,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:23:51,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859564035] [2021-05-22 02:23:51,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:23:51,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:51,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:23:51,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:23:51,567 INFO L87 Difference]: Start difference. First operand 169 states and 375 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:52,608 INFO L93 Difference]: Finished difference Result 255 states and 513 transitions. [2021-05-22 02:23:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:23:52,608 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:52,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:52,609 INFO L225 Difference]: With dead ends: 255 [2021-05-22 02:23:52,609 INFO L226 Difference]: Without dead ends: 217 [2021-05-22 02:23:52,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1214.4ms TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:23:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-22 02:23:52,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 170. [2021-05-22 02:23:52,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.230769230769231) internal successors, (377), 169 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:52,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 377 transitions. [2021-05-22 02:23:52,611 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 377 transitions. Word has length 18 [2021-05-22 02:23:52,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:52,611 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 377 transitions. [2021-05-22 02:23:52,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:52,611 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 377 transitions. [2021-05-22 02:23:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:52,611 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:52,611 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:52,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1435,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:52,812 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:52,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:52,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1142907740, now seen corresponding path program 196 times [2021-05-22 02:23:52,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:52,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133694532] [2021-05-22 02:23:52,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:52,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:52,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133694532] [2021-05-22 02:23:52,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133694532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:52,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663920662] [2021-05-22 02:23:52,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:52,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:23:52,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:52,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:23:52,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:53,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663920662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:53,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:53,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:23:53,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227727890] [2021-05-22 02:23:53,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:23:53,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:53,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:23:53,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:23:53,280 INFO L87 Difference]: Start difference. First operand 170 states and 377 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:53,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:53,597 INFO L93 Difference]: Finished difference Result 188 states and 403 transitions. [2021-05-22 02:23:53,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:23:53,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:53,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:53,598 INFO L225 Difference]: With dead ends: 188 [2021-05-22 02:23:53,598 INFO L226 Difference]: Without dead ends: 173 [2021-05-22 02:23:53,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 578.3ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:23:53,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-22 02:23:53,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2021-05-22 02:23:53,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.2294117647058824) internal successors, (379), 170 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 379 transitions. [2021-05-22 02:23:53,600 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 379 transitions. Word has length 18 [2021-05-22 02:23:53,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:53,600 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 379 transitions. [2021-05-22 02:23:53,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:53,600 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 379 transitions. [2021-05-22 02:23:53,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:53,600 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:53,600 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:53,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1446 [2021-05-22 02:23:53,808 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:53,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:53,808 INFO L82 PathProgramCache]: Analyzing trace with hash -510045634, now seen corresponding path program 197 times [2021-05-22 02:23:53,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:53,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707491209] [2021-05-22 02:23:53,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:53,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:53,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707491209] [2021-05-22 02:23:53,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707491209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:53,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345116408] [2021-05-22 02:23:53,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:54,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:23:54,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:54,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:54,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:54,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345116408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:54,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:54,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:23:54,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870824442] [2021-05-22 02:23:54,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:23:54,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:54,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:23:54,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:23:54,376 INFO L87 Difference]: Start difference. First operand 171 states and 379 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:54,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:54,706 INFO L93 Difference]: Finished difference Result 187 states and 402 transitions. [2021-05-22 02:23:54,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:23:54,707 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:54,707 INFO L225 Difference]: With dead ends: 187 [2021-05-22 02:23:54,707 INFO L226 Difference]: Without dead ends: 174 [2021-05-22 02:23:54,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 658.7ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:23:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-22 02:23:54,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2021-05-22 02:23:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2280701754385963) internal successors, (381), 171 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:54,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 381 transitions. [2021-05-22 02:23:54,709 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 381 transitions. Word has length 18 [2021-05-22 02:23:54,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:54,709 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 381 transitions. [2021-05-22 02:23:54,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 381 transitions. [2021-05-22 02:23:54,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:54,709 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:54,709 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:54,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1456 [2021-05-22 02:23:54,910 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:54,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:54,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2087387364, now seen corresponding path program 198 times [2021-05-22 02:23:54,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:54,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452069731] [2021-05-22 02:23:54,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:54,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:55,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:55,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452069731] [2021-05-22 02:23:55,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452069731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:55,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947845812] [2021-05-22 02:23:55,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:55,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:23:55,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:55,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:55,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:55,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947845812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:55,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:55,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:23:55,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803151171] [2021-05-22 02:23:55,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:23:55,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:55,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:23:55,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:23:55,518 INFO L87 Difference]: Start difference. First operand 172 states and 381 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:56,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:56,387 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2021-05-22 02:23:56,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:23:56,387 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:56,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:56,388 INFO L225 Difference]: With dead ends: 228 [2021-05-22 02:23:56,388 INFO L226 Difference]: Without dead ends: 196 [2021-05-22 02:23:56,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1109.6ms TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:23:56,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-22 02:23:56,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 170. [2021-05-22 02:23:56,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.230769230769231) internal successors, (377), 169 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 377 transitions. [2021-05-22 02:23:56,390 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 377 transitions. Word has length 18 [2021-05-22 02:23:56,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:56,390 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 377 transitions. [2021-05-22 02:23:56,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:56,390 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 377 transitions. [2021-05-22 02:23:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:56,390 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:56,390 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:56,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1467,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:56,590 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:56,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:56,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1993180572, now seen corresponding path program 199 times [2021-05-22 02:23:56,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:56,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517727451] [2021-05-22 02:23:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:56,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:56,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517727451] [2021-05-22 02:23:56,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517727451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:56,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379890566] [2021-05-22 02:23:56,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:56,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:23:56,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:57,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379890566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:57,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:57,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:57,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835493623] [2021-05-22 02:23:57,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:57,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:57,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:57,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:57,108 INFO L87 Difference]: Start difference. First operand 170 states and 377 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:57,416 INFO L93 Difference]: Finished difference Result 187 states and 404 transitions. [2021-05-22 02:23:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:23:57,416 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:57,416 INFO L225 Difference]: With dead ends: 187 [2021-05-22 02:23:57,416 INFO L226 Difference]: Without dead ends: 180 [2021-05-22 02:23:57,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 550.7ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:23:57,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-22 02:23:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2021-05-22 02:23:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2339181286549707) internal successors, (382), 171 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:57,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 382 transitions. [2021-05-22 02:23:57,421 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 382 transitions. Word has length 18 [2021-05-22 02:23:57,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:57,421 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 382 transitions. [2021-05-22 02:23:57,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 382 transitions. [2021-05-22 02:23:57,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:57,422 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:57,422 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:57,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1478 [2021-05-22 02:23:57,622 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:57,623 INFO L82 PathProgramCache]: Analyzing trace with hash 724444994, now seen corresponding path program 200 times [2021-05-22 02:23:57,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:57,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628617091] [2021-05-22 02:23:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:57,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:57,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628617091] [2021-05-22 02:23:57,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628617091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:57,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928175697] [2021-05-22 02:23:57,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:57,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:23:57,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:57,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:57,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:58,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928175697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:58,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:58,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:58,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485372275] [2021-05-22 02:23:58,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:58,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:58,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:58,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:58,152 INFO L87 Difference]: Start difference. First operand 172 states and 382 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:58,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:23:58,649 INFO L93 Difference]: Finished difference Result 218 states and 454 transitions. [2021-05-22 02:23:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:23:58,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:23:58,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:23:58,650 INFO L225 Difference]: With dead ends: 218 [2021-05-22 02:23:58,650 INFO L226 Difference]: Without dead ends: 207 [2021-05-22 02:23:58,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 719.2ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:23:58,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-22 02:23:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 173. [2021-05-22 02:23:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.2325581395348837) internal successors, (384), 172 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-05-22 02:23:58,652 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 18 [2021-05-22 02:23:58,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:23:58,652 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-05-22 02:23:58,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:23:58,652 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-05-22 02:23:58,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:23:58,652 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:23:58,652 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:23:58,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:58,852 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:23:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:23:58,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2059036324, now seen corresponding path program 201 times [2021-05-22 02:23:58,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:23:58,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610687962] [2021-05-22 02:23:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:23:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:23:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:58,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:23:58,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610687962] [2021-05-22 02:23:58,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610687962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:58,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236623745] [2021-05-22 02:23:58,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:23:59,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:23:59,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:23:59,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:23:59,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:23:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:23:59,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236623745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:23:59,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:23:59,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:23:59,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116870863] [2021-05-22 02:23:59,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:23:59,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:23:59,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:23:59,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:23:59,322 INFO L87 Difference]: Start difference. First operand 173 states and 384 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:00,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:00,295 INFO L93 Difference]: Finished difference Result 250 states and 508 transitions. [2021-05-22 02:24:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:24:00,295 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:00,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:00,295 INFO L225 Difference]: With dead ends: 250 [2021-05-22 02:24:00,295 INFO L226 Difference]: Without dead ends: 224 [2021-05-22 02:24:00,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1089.9ms TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:24:00,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-22 02:24:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 174. [2021-05-22 02:24:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.23121387283237) internal successors, (386), 173 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 386 transitions. [2021-05-22 02:24:00,297 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 386 transitions. Word has length 18 [2021-05-22 02:24:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:00,297 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 386 transitions. [2021-05-22 02:24:00,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 386 transitions. [2021-05-22 02:24:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:00,298 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:00,298 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:00,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1502 [2021-05-22 02:24:00,498 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:00,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:00,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1437986497, now seen corresponding path program 202 times [2021-05-22 02:24:00,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:00,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353307405] [2021-05-22 02:24:00,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:24:00,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:00,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353307405] [2021-05-22 02:24:00,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353307405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:00,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161919347] [2021-05-22 02:24:00,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:00,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:00,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:00,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:24:00,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:24:00,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161919347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:00,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:00,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:24:00,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972722067] [2021-05-22 02:24:00,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:24:00,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:00,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:24:00,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:00,710 INFO L87 Difference]: Start difference. First operand 174 states and 386 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:01,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:01,009 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2021-05-22 02:24:01,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:24:01,009 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:01,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:01,009 INFO L225 Difference]: With dead ends: 207 [2021-05-22 02:24:01,009 INFO L226 Difference]: Without dead ends: 207 [2021-05-22 02:24:01,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:24:01,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-22 02:24:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 174. [2021-05-22 02:24:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.23121387283237) internal successors, (386), 173 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 386 transitions. [2021-05-22 02:24:01,011 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 386 transitions. Word has length 18 [2021-05-22 02:24:01,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:01,011 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 386 transitions. [2021-05-22 02:24:01,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:01,011 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 386 transitions. [2021-05-22 02:24:01,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:01,011 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:01,012 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:01,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1515,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:01,212 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:01,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:01,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1230791260, now seen corresponding path program 203 times [2021-05-22 02:24:01,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:01,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143755750] [2021-05-22 02:24:01,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:01,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:01,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143755750] [2021-05-22 02:24:01,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143755750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:01,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654102777] [2021-05-22 02:24:01,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:01,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:24:01,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:01,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-22 02:24:01,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:01,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654102777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:01,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:01,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:01,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999949637] [2021-05-22 02:24:01,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:01,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:01,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:01,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:01,811 INFO L87 Difference]: Start difference. First operand 174 states and 386 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:02,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:02,426 INFO L93 Difference]: Finished difference Result 227 states and 468 transitions. [2021-05-22 02:24:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:24:02,426 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:02,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:02,426 INFO L225 Difference]: With dead ends: 227 [2021-05-22 02:24:02,426 INFO L226 Difference]: Without dead ends: 216 [2021-05-22 02:24:02,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 924.7ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:24:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-22 02:24:02,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 176. [2021-05-22 02:24:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2285714285714286) internal successors, (390), 175 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 390 transitions. [2021-05-22 02:24:02,428 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 390 transitions. Word has length 18 [2021-05-22 02:24:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:02,428 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 390 transitions. [2021-05-22 02:24:02,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:02,428 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 390 transitions. [2021-05-22 02:24:02,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:02,429 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:02,429 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:02,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1520 [2021-05-22 02:24:02,629 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:02,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:02,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1729584706, now seen corresponding path program 204 times [2021-05-22 02:24:02,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:02,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061102543] [2021-05-22 02:24:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:02,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:02,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061102543] [2021-05-22 02:24:02,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061102543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:02,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588064512] [2021-05-22 02:24:02,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:02,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:24:02,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:02,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-22 02:24:02,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:03,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588064512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:03,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:03,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:03,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303348291] [2021-05-22 02:24:03,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:03,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:03,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:03,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:03,048 INFO L87 Difference]: Start difference. First operand 176 states and 390 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:03,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:03,908 INFO L93 Difference]: Finished difference Result 273 states and 546 transitions. [2021-05-22 02:24:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:24:03,908 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:03,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:03,909 INFO L225 Difference]: With dead ends: 273 [2021-05-22 02:24:03,909 INFO L226 Difference]: Without dead ends: 254 [2021-05-22 02:24:03,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 939.8ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:24:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-22 02:24:03,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 178. [2021-05-22 02:24:03,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.23728813559322) internal successors, (396), 177 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 396 transitions. [2021-05-22 02:24:03,911 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 396 transitions. Word has length 18 [2021-05-22 02:24:03,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:03,911 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 396 transitions. [2021-05-22 02:24:03,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:03,911 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 396 transitions. [2021-05-22 02:24:03,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:03,911 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:03,911 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:04,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1530,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:04,125 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:04,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:04,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2027527012, now seen corresponding path program 205 times [2021-05-22 02:24:04,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:04,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922522413] [2021-05-22 02:24:04,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:04,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:04,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922522413] [2021-05-22 02:24:04,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922522413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:04,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67037889] [2021-05-22 02:24:04,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:04,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:04,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:04,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67037889] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:04,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:04,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:04,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542165532] [2021-05-22 02:24:04,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:04,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:04,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:04,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:04,525 INFO L87 Difference]: Start difference. First operand 178 states and 396 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:05,387 INFO L93 Difference]: Finished difference Result 262 states and 533 transitions. [2021-05-22 02:24:05,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:24:05,388 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:05,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:05,388 INFO L225 Difference]: With dead ends: 262 [2021-05-22 02:24:05,388 INFO L226 Difference]: Without dead ends: 236 [2021-05-22 02:24:05,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 887.4ms TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:24:05,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-22 02:24:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 174. [2021-05-22 02:24:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.213872832369942) internal successors, (383), 173 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 383 transitions. [2021-05-22 02:24:05,390 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 383 transitions. Word has length 18 [2021-05-22 02:24:05,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:05,390 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 383 transitions. [2021-05-22 02:24:05,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:05,390 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 383 transitions. [2021-05-22 02:24:05,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:05,390 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:05,390 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:05,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1542 [2021-05-22 02:24:05,591 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:05,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:05,591 INFO L82 PathProgramCache]: Analyzing trace with hash -725723394, now seen corresponding path program 206 times [2021-05-22 02:24:05,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:05,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686866884] [2021-05-22 02:24:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:05,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:05,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686866884] [2021-05-22 02:24:05,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686866884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:05,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477164540] [2021-05-22 02:24:05,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:05,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:05,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:05,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:05,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:06,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477164540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:06,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:06,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:06,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282776770] [2021-05-22 02:24:06,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:06,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:06,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:06,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:06,109 INFO L87 Difference]: Start difference. First operand 174 states and 383 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:06,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:06,509 INFO L93 Difference]: Finished difference Result 210 states and 446 transitions. [2021-05-22 02:24:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:24:06,510 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:06,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:06,510 INFO L225 Difference]: With dead ends: 210 [2021-05-22 02:24:06,510 INFO L226 Difference]: Without dead ends: 197 [2021-05-22 02:24:06,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 640.3ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:24:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-22 02:24:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 176. [2021-05-22 02:24:06,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2114285714285713) internal successors, (387), 175 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 387 transitions. [2021-05-22 02:24:06,512 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 387 transitions. Word has length 18 [2021-05-22 02:24:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:06,512 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 387 transitions. [2021-05-22 02:24:06,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 387 transitions. [2021-05-22 02:24:06,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:06,512 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:06,512 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:06,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1552 [2021-05-22 02:24:06,713 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:06,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:06,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1991902172, now seen corresponding path program 207 times [2021-05-22 02:24:06,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:06,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363428332] [2021-05-22 02:24:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:06,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:06,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363428332] [2021-05-22 02:24:06,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363428332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:06,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983938566] [2021-05-22 02:24:06,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:06,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:24:06,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:06,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-22 02:24:06,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:07,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983938566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:07,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:07,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:07,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909644534] [2021-05-22 02:24:07,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:07,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:07,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:07,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:07,296 INFO L87 Difference]: Start difference. First operand 176 states and 387 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:08,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:08,072 INFO L93 Difference]: Finished difference Result 228 states and 467 transitions. [2021-05-22 02:24:08,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:24:08,072 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:08,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:08,073 INFO L225 Difference]: With dead ends: 228 [2021-05-22 02:24:08,073 INFO L226 Difference]: Without dead ends: 217 [2021-05-22 02:24:08,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 992.0ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:24:08,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-22 02:24:08,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 177. [2021-05-22 02:24:08,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.210227272727273) internal successors, (389), 176 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:08,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 389 transitions. [2021-05-22 02:24:08,075 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 389 transitions. Word has length 18 [2021-05-22 02:24:08,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:08,075 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 389 transitions. [2021-05-22 02:24:08,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 389 transitions. [2021-05-22 02:24:08,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:08,075 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:08,075 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:08,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1563 [2021-05-22 02:24:08,276 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:08,276 INFO L82 PathProgramCache]: Analyzing trace with hash -968473794, now seen corresponding path program 208 times [2021-05-22 02:24:08,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:08,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005136873] [2021-05-22 02:24:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:08,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:08,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005136873] [2021-05-22 02:24:08,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005136873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:08,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547299415] [2021-05-22 02:24:08,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:08,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:08,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:08,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:08,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:08,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547299415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:08,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:08,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:08,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839873890] [2021-05-22 02:24:08,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:08,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:08,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:08,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:08,768 INFO L87 Difference]: Start difference. First operand 177 states and 389 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:09,529 INFO L93 Difference]: Finished difference Result 237 states and 483 transitions. [2021-05-22 02:24:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:24:09,530 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:09,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:09,530 INFO L225 Difference]: With dead ends: 237 [2021-05-22 02:24:09,530 INFO L226 Difference]: Without dead ends: 211 [2021-05-22 02:24:09,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 883.1ms TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:24:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-22 02:24:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 176. [2021-05-22 02:24:09,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2114285714285713) internal successors, (387), 175 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:09,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 387 transitions. [2021-05-22 02:24:09,532 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 387 transitions. Word has length 18 [2021-05-22 02:24:09,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:09,532 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 387 transitions. [2021-05-22 02:24:09,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:09,532 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 387 transitions. [2021-05-22 02:24:09,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:09,532 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:09,532 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:09,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1574 [2021-05-22 02:24:09,733 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:09,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1796718858, now seen corresponding path program 209 times [2021-05-22 02:24:09,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:09,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221472672] [2021-05-22 02:24:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:09,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:09,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:09,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221472672] [2021-05-22 02:24:09,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221472672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:09,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022557228] [2021-05-22 02:24:09,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:09,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:24:09,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:09,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:09,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:10,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022557228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:10,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:10,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:10,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596378116] [2021-05-22 02:24:10,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:10,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:10,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:10,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:10,283 INFO L87 Difference]: Start difference. First operand 176 states and 387 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:10,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:10,675 INFO L93 Difference]: Finished difference Result 207 states and 439 transitions. [2021-05-22 02:24:10,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:24:10,676 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:10,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:10,676 INFO L225 Difference]: With dead ends: 207 [2021-05-22 02:24:10,676 INFO L226 Difference]: Without dead ends: 196 [2021-05-22 02:24:10,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 600.9ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:24:10,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-22 02:24:10,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 178. [2021-05-22 02:24:10,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.209039548022599) internal successors, (391), 177 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 391 transitions. [2021-05-22 02:24:10,678 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 391 transitions. Word has length 18 [2021-05-22 02:24:10,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:10,678 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 391 transitions. [2021-05-22 02:24:10,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:10,678 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 391 transitions. [2021-05-22 02:24:10,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:10,678 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:10,678 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:10,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-05-22 02:24:10,879 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:10,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:10,879 INFO L82 PathProgramCache]: Analyzing trace with hash -462127528, now seen corresponding path program 210 times [2021-05-22 02:24:10,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:10,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53999718] [2021-05-22 02:24:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:11,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:11,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:11,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53999718] [2021-05-22 02:24:11,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53999718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:11,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71459897] [2021-05-22 02:24:11,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:11,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:24:11,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:11,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:11,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:11,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71459897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:11,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:11,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:11,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142137062] [2021-05-22 02:24:11,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:11,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:11,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:11,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:11,348 INFO L87 Difference]: Start difference. First operand 178 states and 391 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:12,294 INFO L93 Difference]: Finished difference Result 268 states and 536 transitions. [2021-05-22 02:24:12,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:24:12,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:12,295 INFO L225 Difference]: With dead ends: 268 [2021-05-22 02:24:12,295 INFO L226 Difference]: Without dead ends: 249 [2021-05-22 02:24:12,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1119.7ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:24:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-22 02:24:12,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 179. [2021-05-22 02:24:12,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.207865168539326) internal successors, (393), 178 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 393 transitions. [2021-05-22 02:24:12,296 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 393 transitions. Word has length 18 [2021-05-22 02:24:12,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:12,297 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 393 transitions. [2021-05-22 02:24:12,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:12,297 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 393 transitions. [2021-05-22 02:24:12,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:12,297 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:12,297 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:12,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1596,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:12,512 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:12,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash -999983106, now seen corresponding path program 211 times [2021-05-22 02:24:12,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:12,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527286623] [2021-05-22 02:24:12,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:12,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:12,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527286623] [2021-05-22 02:24:12,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527286623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:12,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811261034] [2021-05-22 02:24:12,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:12,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:12,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:12,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811261034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:12,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:12,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:12,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505363707] [2021-05-22 02:24:12,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:12,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:12,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:12,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:12,929 INFO L87 Difference]: Start difference. First operand 179 states and 393 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:13,659 INFO L93 Difference]: Finished difference Result 245 states and 513 transitions. [2021-05-22 02:24:13,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:24:13,659 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:13,660 INFO L225 Difference]: With dead ends: 245 [2021-05-22 02:24:13,660 INFO L226 Difference]: Without dead ends: 226 [2021-05-22 02:24:13,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 774.3ms TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:24:13,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-22 02:24:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 182. [2021-05-22 02:24:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2209944751381214) internal successors, (402), 181 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 402 transitions. [2021-05-22 02:24:13,662 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 402 transitions. Word has length 18 [2021-05-22 02:24:13,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:13,662 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 402 transitions. [2021-05-22 02:24:13,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:13,662 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 402 transitions. [2021-05-22 02:24:13,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:13,662 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:13,662 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:13,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1609,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:13,863 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:13,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:13,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1015113500, now seen corresponding path program 212 times [2021-05-22 02:24:13,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:13,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149719398] [2021-05-22 02:24:13,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:14,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:14,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149719398] [2021-05-22 02:24:14,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149719398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:14,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221068548] [2021-05-22 02:24:14,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:14,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:14,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:14,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:14,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:14,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221068548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:14,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:14,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:14,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703589568] [2021-05-22 02:24:14,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:14,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:14,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:14,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:14,394 INFO L87 Difference]: Start difference. First operand 182 states and 402 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:15,224 INFO L93 Difference]: Finished difference Result 260 states and 519 transitions. [2021-05-22 02:24:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:24:15,224 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:15,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:15,224 INFO L225 Difference]: With dead ends: 260 [2021-05-22 02:24:15,224 INFO L226 Difference]: Without dead ends: 249 [2021-05-22 02:24:15,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 985.1ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:24:15,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-22 02:24:15,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 183. [2021-05-22 02:24:15,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2252747252747254) internal successors, (405), 182 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 405 transitions. [2021-05-22 02:24:15,226 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 405 transitions. Word has length 18 [2021-05-22 02:24:15,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:15,226 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 405 transitions. [2021-05-22 02:24:15,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:15,226 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 405 transitions. [2021-05-22 02:24:15,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:15,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:15,227 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:15,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:15,438 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:15,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:15,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1698620183, now seen corresponding path program 213 times [2021-05-22 02:24:15,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:15,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157187475] [2021-05-22 02:24:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:24:15,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:15,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157187475] [2021-05-22 02:24:15,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157187475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:15,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044819867] [2021-05-22 02:24:15,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:15,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:24:15,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:15,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:24:15,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:24:15,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044819867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:15,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:15,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:24:15,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223152228] [2021-05-22 02:24:15,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:24:15,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:15,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:24:15,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:15,697 INFO L87 Difference]: Start difference. First operand 183 states and 405 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:15,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:15,768 INFO L93 Difference]: Finished difference Result 184 states and 405 transitions. [2021-05-22 02:24:15,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:24:15,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:15,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:15,769 INFO L225 Difference]: With dead ends: 184 [2021-05-22 02:24:15,769 INFO L226 Difference]: Without dead ends: 184 [2021-05-22 02:24:15,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-22 02:24:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 176. [2021-05-22 02:24:15,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2285714285714286) internal successors, (390), 175 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:15,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 390 transitions. [2021-05-22 02:24:15,770 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 390 transitions. Word has length 18 [2021-05-22 02:24:15,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:15,770 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 390 transitions. [2021-05-22 02:24:15,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:15,770 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 390 transitions. [2021-05-22 02:24:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:15,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:15,771 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:15,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1630 [2021-05-22 02:24:15,971 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:15,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1945262466, now seen corresponding path program 214 times [2021-05-22 02:24:15,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:15,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775405425] [2021-05-22 02:24:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:16,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:16,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775405425] [2021-05-22 02:24:16,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775405425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:16,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469880681] [2021-05-22 02:24:16,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:16,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:16,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:16,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:16,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:16,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469880681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:16,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:16,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:16,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862206300] [2021-05-22 02:24:16,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:16,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:16,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:16,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:16,431 INFO L87 Difference]: Start difference. First operand 176 states and 390 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:17,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:17,063 INFO L93 Difference]: Finished difference Result 247 states and 500 transitions. [2021-05-22 02:24:17,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:24:17,064 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:17,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:17,064 INFO L225 Difference]: With dead ends: 247 [2021-05-22 02:24:17,064 INFO L226 Difference]: Without dead ends: 221 [2021-05-22 02:24:17,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 774.6ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:24:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-22 02:24:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 175. [2021-05-22 02:24:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2298850574712645) internal successors, (388), 174 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 388 transitions. [2021-05-22 02:24:17,066 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 388 transitions. Word has length 18 [2021-05-22 02:24:17,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:17,066 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 388 transitions. [2021-05-22 02:24:17,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:17,066 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 388 transitions. [2021-05-22 02:24:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:17,066 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:17,066 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:17,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:17,267 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:17,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:17,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1811849252, now seen corresponding path program 215 times [2021-05-22 02:24:17,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:17,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55895626] [2021-05-22 02:24:17,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:17,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:17,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55895626] [2021-05-22 02:24:17,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55895626] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:17,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602203611] [2021-05-22 02:24:17,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:17,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:24:17,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:17,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:17,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:17,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602203611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:17,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:17,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:17,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623569108] [2021-05-22 02:24:17,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:17,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:17,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:17,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:17,772 INFO L87 Difference]: Start difference. First operand 175 states and 388 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:18,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:18,626 INFO L93 Difference]: Finished difference Result 254 states and 520 transitions. [2021-05-22 02:24:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:24:18,627 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:18,627 INFO L225 Difference]: With dead ends: 254 [2021-05-22 02:24:18,627 INFO L226 Difference]: Without dead ends: 227 [2021-05-22 02:24:18,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1035.8ms TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:24:18,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-22 02:24:18,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 178. [2021-05-22 02:24:18,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2429378531073447) internal successors, (397), 177 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:18,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 397 transitions. [2021-05-22 02:24:18,629 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 397 transitions. Word has length 18 [2021-05-22 02:24:18,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:18,629 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 397 transitions. [2021-05-22 02:24:18,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 397 transitions. [2021-05-22 02:24:18,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:18,629 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:18,629 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:18,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1648 [2021-05-22 02:24:18,830 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:18,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:18,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1976771778, now seen corresponding path program 216 times [2021-05-22 02:24:18,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:18,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799118668] [2021-05-22 02:24:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:18,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:18,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799118668] [2021-05-22 02:24:18,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799118668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:18,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901188937] [2021-05-22 02:24:18,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:18,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:24:18,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:19,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:19,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:19,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901188937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:19,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:19,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:19,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002127128] [2021-05-22 02:24:19,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:19,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:19,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:19,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:19,379 INFO L87 Difference]: Start difference. First operand 178 states and 397 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:20,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:20,589 INFO L93 Difference]: Finished difference Result 284 states and 575 transitions. [2021-05-22 02:24:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:24:20,589 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:20,589 INFO L225 Difference]: With dead ends: 284 [2021-05-22 02:24:20,589 INFO L226 Difference]: Without dead ends: 252 [2021-05-22 02:24:20,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1378.5ms TimeCoverageRelationStatistics Valid=222, Invalid=968, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:24:20,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-22 02:24:20,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 180. [2021-05-22 02:24:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2513966480446927) internal successors, (403), 179 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 403 transitions. [2021-05-22 02:24:20,591 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 403 transitions. Word has length 18 [2021-05-22 02:24:20,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:20,591 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 403 transitions. [2021-05-22 02:24:20,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:20,591 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 403 transitions. [2021-05-22 02:24:20,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:20,592 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:20,592 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:20,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1659 [2021-05-22 02:24:20,792 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:20,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:20,792 INFO L82 PathProgramCache]: Analyzing trace with hash -89256540, now seen corresponding path program 217 times [2021-05-22 02:24:20,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:20,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735626804] [2021-05-22 02:24:20,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:20,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:20,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735626804] [2021-05-22 02:24:20,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735626804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:20,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831192374] [2021-05-22 02:24:20,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:20,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:20,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:21,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831192374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:21,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:21,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:21,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345649387] [2021-05-22 02:24:21,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:21,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:21,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:21,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:21,345 INFO L87 Difference]: Start difference. First operand 180 states and 403 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:21,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:21,759 INFO L93 Difference]: Finished difference Result 198 states and 431 transitions. [2021-05-22 02:24:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:24:21,759 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:21,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:21,760 INFO L225 Difference]: With dead ends: 198 [2021-05-22 02:24:21,760 INFO L226 Difference]: Without dead ends: 185 [2021-05-22 02:24:21,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 639.6ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:24:21,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-22 02:24:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 181. [2021-05-22 02:24:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.25) internal successors, (405), 180 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 405 transitions. [2021-05-22 02:24:21,762 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 405 transitions. Word has length 18 [2021-05-22 02:24:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:21,762 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 405 transitions. [2021-05-22 02:24:21,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:21,762 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 405 transitions. [2021-05-22 02:24:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:21,762 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:21,762 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:21,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1671 [2021-05-22 02:24:21,963 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:21,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:21,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1666598270, now seen corresponding path program 218 times [2021-05-22 02:24:21,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:21,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974294230] [2021-05-22 02:24:21,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:22,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:22,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974294230] [2021-05-22 02:24:22,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974294230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:22,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942245619] [2021-05-22 02:24:22,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:22,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:22,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:22,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:22,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:22,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942245619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:22,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:22,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:22,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171812570] [2021-05-22 02:24:22,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:22,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:22,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:22,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:22,608 INFO L87 Difference]: Start difference. First operand 181 states and 405 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:23,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:23,567 INFO L93 Difference]: Finished difference Result 211 states and 455 transitions. [2021-05-22 02:24:23,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:24:23,568 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:23,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:23,568 INFO L225 Difference]: With dead ends: 211 [2021-05-22 02:24:23,568 INFO L226 Difference]: Without dead ends: 200 [2021-05-22 02:24:23,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1181.9ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:24:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-22 02:24:23,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 182. [2021-05-22 02:24:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.248618784530387) internal successors, (407), 181 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 407 transitions. [2021-05-22 02:24:23,570 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 407 transitions. Word has length 18 [2021-05-22 02:24:23,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:23,570 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 407 transitions. [2021-05-22 02:24:23,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:23,570 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 407 transitions. [2021-05-22 02:24:23,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:23,570 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:23,570 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:23,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1680 [2021-05-22 02:24:23,770 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:23,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:23,771 INFO L82 PathProgramCache]: Analyzing trace with hash -332006940, now seen corresponding path program 219 times [2021-05-22 02:24:23,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:23,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111951383] [2021-05-22 02:24:23,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:23,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:23,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111951383] [2021-05-22 02:24:23,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111951383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:23,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619303956] [2021-05-22 02:24:23,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:24,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:24:24,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:24,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:24,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:24,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619303956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:24,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:24,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:24,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131548851] [2021-05-22 02:24:24,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:24,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:24,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:24,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:24,294 INFO L87 Difference]: Start difference. First operand 182 states and 407 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:25,192 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 58 [2021-05-22 02:24:25,644 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2021-05-22 02:24:26,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:26,021 INFO L93 Difference]: Finished difference Result 264 states and 548 transitions. [2021-05-22 02:24:26,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:24:26,022 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:26,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:26,022 INFO L225 Difference]: With dead ends: 264 [2021-05-22 02:24:26,022 INFO L226 Difference]: Without dead ends: 238 [2021-05-22 02:24:26,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1818.3ms TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:24:26,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-22 02:24:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 185. [2021-05-22 02:24:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.266304347826087) internal successors, (417), 184 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 417 transitions. [2021-05-22 02:24:26,024 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 417 transitions. Word has length 18 [2021-05-22 02:24:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:26,024 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 417 transitions. [2021-05-22 02:24:26,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 417 transitions. [2021-05-22 02:24:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:26,024 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:26,024 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:26,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1693 [2021-05-22 02:24:26,239 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:26,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:26,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1160252004, now seen corresponding path program 220 times [2021-05-22 02:24:26,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:26,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211485065] [2021-05-22 02:24:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:26,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:26,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211485065] [2021-05-22 02:24:26,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211485065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:26,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899738055] [2021-05-22 02:24:26,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:26,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:26,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:26,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:26,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:26,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899738055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:26,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:26,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:26,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094181871] [2021-05-22 02:24:26,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:26,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:26,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:26,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:26,761 INFO L87 Difference]: Start difference. First operand 185 states and 417 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:27,432 INFO L93 Difference]: Finished difference Result 217 states and 472 transitions. [2021-05-22 02:24:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:24:27,432 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:27,432 INFO L225 Difference]: With dead ends: 217 [2021-05-22 02:24:27,432 INFO L226 Difference]: Without dead ends: 206 [2021-05-22 02:24:27,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 838.9ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:24:27,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-22 02:24:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 187. [2021-05-22 02:24:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.263440860215054) internal successors, (421), 186 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 421 transitions. [2021-05-22 02:24:27,434 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 421 transitions. Word has length 18 [2021-05-22 02:24:27,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:27,434 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 421 transitions. [2021-05-22 02:24:27,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 421 transitions. [2021-05-22 02:24:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:27,435 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:27,435 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:27,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1703,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:27,636 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:27,636 INFO L82 PathProgramCache]: Analyzing trace with hash 174339326, now seen corresponding path program 221 times [2021-05-22 02:24:27,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:27,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757377177] [2021-05-22 02:24:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:27,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:27,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757377177] [2021-05-22 02:24:27,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757377177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:27,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765558699] [2021-05-22 02:24:27,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:27,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:24:27,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:27,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:27,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:28,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765558699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:28,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:28,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:28,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430097321] [2021-05-22 02:24:28,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:28,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:28,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:28,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:28,132 INFO L87 Difference]: Start difference. First operand 187 states and 421 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:28,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:28,832 INFO L93 Difference]: Finished difference Result 263 states and 543 transitions. [2021-05-22 02:24:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:24:28,832 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:28,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:28,833 INFO L225 Difference]: With dead ends: 263 [2021-05-22 02:24:28,833 INFO L226 Difference]: Without dead ends: 244 [2021-05-22 02:24:28,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 866.7ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:24:28,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-22 02:24:28,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 186. [2021-05-22 02:24:28,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.264864864864865) internal successors, (419), 185 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 419 transitions. [2021-05-22 02:24:28,835 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 419 transitions. Word has length 18 [2021-05-22 02:24:28,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:28,835 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 419 transitions. [2021-05-22 02:24:28,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 419 transitions. [2021-05-22 02:24:28,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:28,835 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:28,835 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:29,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1714 [2021-05-22 02:24:29,036 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:29,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:29,036 INFO L82 PathProgramCache]: Analyzing trace with hash -363516252, now seen corresponding path program 222 times [2021-05-22 02:24:29,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:29,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529817691] [2021-05-22 02:24:29,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:29,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:29,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529817691] [2021-05-22 02:24:29,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529817691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:29,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555507483] [2021-05-22 02:24:29,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:29,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:24:29,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:29,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:29,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:29,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555507483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:29,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:29,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:29,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706313556] [2021-05-22 02:24:29,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:29,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:29,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:29,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:29,570 INFO L87 Difference]: Start difference. First operand 186 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:30,414 INFO L93 Difference]: Finished difference Result 265 states and 553 transitions. [2021-05-22 02:24:30,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:24:30,414 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:30,415 INFO L225 Difference]: With dead ends: 265 [2021-05-22 02:24:30,415 INFO L226 Difference]: Without dead ends: 204 [2021-05-22 02:24:30,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1024.7ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:24:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-22 02:24:30,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 188. [2021-05-22 02:24:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2620320855614975) internal successors, (423), 187 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 423 transitions. [2021-05-22 02:24:30,417 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 423 transitions. Word has length 18 [2021-05-22 02:24:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:30,417 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 423 transitions. [2021-05-22 02:24:30,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 423 transitions. [2021-05-22 02:24:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:30,417 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:30,417 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:30,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1727,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:30,617 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:30,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1651580354, now seen corresponding path program 223 times [2021-05-22 02:24:30,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:30,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962867416] [2021-05-22 02:24:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:30,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:30,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962867416] [2021-05-22 02:24:30,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962867416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:30,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753152038] [2021-05-22 02:24:30,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:30,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:30,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:31,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753152038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:31,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:31,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:31,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53376299] [2021-05-22 02:24:31,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:31,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:31,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:31,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:31,125 INFO L87 Difference]: Start difference. First operand 188 states and 423 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:31,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:31,765 INFO L93 Difference]: Finished difference Result 245 states and 511 transitions. [2021-05-22 02:24:31,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:24:31,765 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:31,765 INFO L225 Difference]: With dead ends: 245 [2021-05-22 02:24:31,765 INFO L226 Difference]: Without dead ends: 213 [2021-05-22 02:24:31,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 807.1ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:24:31,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-22 02:24:31,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 190. [2021-05-22 02:24:31,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.259259259259259) internal successors, (427), 189 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 427 transitions. [2021-05-22 02:24:31,767 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 427 transitions. Word has length 18 [2021-05-22 02:24:31,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:31,767 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 427 transitions. [2021-05-22 02:24:31,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:31,767 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 427 transitions. [2021-05-22 02:24:31,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:31,768 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:31,768 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:31,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1739,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:31,968 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:31,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:31,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1846651190, now seen corresponding path program 224 times [2021-05-22 02:24:31,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:31,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526967241] [2021-05-22 02:24:31,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:32,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:32,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526967241] [2021-05-22 02:24:32,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526967241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:32,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468041829] [2021-05-22 02:24:32,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:32,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:32,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:32,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:32,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:32,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468041829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:32,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:32,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:32,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96461219] [2021-05-22 02:24:32,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:32,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:32,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:32,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:32,473 INFO L87 Difference]: Start difference. First operand 190 states and 427 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:33,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:33,032 INFO L93 Difference]: Finished difference Result 266 states and 546 transitions. [2021-05-22 02:24:33,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:24:33,032 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:33,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:33,032 INFO L225 Difference]: With dead ends: 266 [2021-05-22 02:24:33,032 INFO L226 Difference]: Without dead ends: 234 [2021-05-22 02:24:33,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 776.4ms TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:24:33,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-22 02:24:33,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 189. [2021-05-22 02:24:33,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.2606382978723403) internal successors, (425), 188 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 425 transitions. [2021-05-22 02:24:33,034 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 425 transitions. Word has length 18 [2021-05-22 02:24:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:33,034 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 425 transitions. [2021-05-22 02:24:33,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:33,034 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 425 transitions. [2021-05-22 02:24:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:33,035 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:33,035 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:33,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1750 [2021-05-22 02:24:33,235 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:33,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:33,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1340304924, now seen corresponding path program 225 times [2021-05-22 02:24:33,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:33,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168868485] [2021-05-22 02:24:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:33,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:33,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168868485] [2021-05-22 02:24:33,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168868485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:33,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914246777] [2021-05-22 02:24:33,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:33,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:24:33,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:33,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:33,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:33,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914246777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:33,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:33,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:33,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154998775] [2021-05-22 02:24:33,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:33,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:33,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:33,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:33,710 INFO L87 Difference]: Start difference. First operand 189 states and 425 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:34,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:34,329 INFO L93 Difference]: Finished difference Result 270 states and 554 transitions. [2021-05-22 02:24:34,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:24:34,329 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:34,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:34,329 INFO L225 Difference]: With dead ends: 270 [2021-05-22 02:24:34,330 INFO L226 Difference]: Without dead ends: 235 [2021-05-22 02:24:34,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 743.0ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:24:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-22 02:24:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 188. [2021-05-22 02:24:34,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2620320855614975) internal successors, (423), 187 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:34,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 423 transitions. [2021-05-22 02:24:34,331 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 423 transitions. Word has length 18 [2021-05-22 02:24:34,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:34,332 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 423 transitions. [2021-05-22 02:24:34,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:34,332 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 423 transitions. [2021-05-22 02:24:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:34,332 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:34,332 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:34,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1761 [2021-05-22 02:24:34,532 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:34,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:34,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1375929764, now seen corresponding path program 226 times [2021-05-22 02:24:34,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:34,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317294079] [2021-05-22 02:24:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:34,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:34,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317294079] [2021-05-22 02:24:34,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317294079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:34,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312587858] [2021-05-22 02:24:34,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:34,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:34,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:34,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:34,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:35,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312587858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:35,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:35,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:35,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460956771] [2021-05-22 02:24:35,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:35,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:35,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:35,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:35,074 INFO L87 Difference]: Start difference. First operand 188 states and 423 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:36,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:36,153 INFO L93 Difference]: Finished difference Result 265 states and 542 transitions. [2021-05-22 02:24:36,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:24:36,153 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:36,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:36,153 INFO L225 Difference]: With dead ends: 265 [2021-05-22 02:24:36,153 INFO L226 Difference]: Without dead ends: 233 [2021-05-22 02:24:36,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1229.1ms TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:24:36,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-22 02:24:36,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 188. [2021-05-22 02:24:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2566844919786098) internal successors, (422), 187 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 422 transitions. [2021-05-22 02:24:36,155 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 422 transitions. Word has length 18 [2021-05-22 02:24:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:36,155 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 422 transitions. [2021-05-22 02:24:36,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:36,155 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 422 transitions. [2021-05-22 02:24:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:36,155 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:36,155 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:36,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1771 [2021-05-22 02:24:36,356 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:36,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:36,356 INFO L82 PathProgramCache]: Analyzing trace with hash -579194012, now seen corresponding path program 227 times [2021-05-22 02:24:36,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:36,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044322630] [2021-05-22 02:24:36,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:36,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:36,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044322630] [2021-05-22 02:24:36,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044322630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:36,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279025920] [2021-05-22 02:24:36,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:36,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:24:36,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:36,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:36,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:36,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279025920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:36,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:36,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:36,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935404952] [2021-05-22 02:24:36,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:36,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:36,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:36,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:36,872 INFO L87 Difference]: Start difference. First operand 188 states and 422 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:37,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:37,352 INFO L93 Difference]: Finished difference Result 267 states and 547 transitions. [2021-05-22 02:24:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:24:37,353 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:37,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:37,353 INFO L225 Difference]: With dead ends: 267 [2021-05-22 02:24:37,353 INFO L226 Difference]: Without dead ends: 245 [2021-05-22 02:24:37,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 670.1ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:24:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-22 02:24:37,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 188. [2021-05-22 02:24:37,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2566844919786098) internal successors, (422), 187 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:37,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 422 transitions. [2021-05-22 02:24:37,355 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 422 transitions. Word has length 18 [2021-05-22 02:24:37,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:37,355 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 422 transitions. [2021-05-22 02:24:37,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:37,355 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 422 transitions. [2021-05-22 02:24:37,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:37,355 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:37,355 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:37,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1784,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:37,556 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:37,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:37,556 INFO L82 PathProgramCache]: Analyzing trace with hash -72847746, now seen corresponding path program 228 times [2021-05-22 02:24:37,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:37,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652654925] [2021-05-22 02:24:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:37,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:37,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:37,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652654925] [2021-05-22 02:24:37,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652654925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:37,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342418864] [2021-05-22 02:24:37,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:37,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:24:37,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:37,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:37,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:38,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342418864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:38,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:38,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:38,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403056782] [2021-05-22 02:24:38,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:38,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:38,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:38,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:38,158 INFO L87 Difference]: Start difference. First operand 188 states and 422 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:39,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:39,147 INFO L93 Difference]: Finished difference Result 305 states and 613 transitions. [2021-05-22 02:24:39,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:24:39,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:39,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:39,147 INFO L225 Difference]: With dead ends: 305 [2021-05-22 02:24:39,148 INFO L226 Difference]: Without dead ends: 245 [2021-05-22 02:24:39,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1218.7ms TimeCoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:24:39,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-22 02:24:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 192. [2021-05-22 02:24:39,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.261780104712042) internal successors, (432), 191 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 432 transitions. [2021-05-22 02:24:39,150 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 432 transitions. Word has length 18 [2021-05-22 02:24:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:39,150 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 432 transitions. [2021-05-22 02:24:39,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:39,150 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 432 transitions. [2021-05-22 02:24:39,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:39,150 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:39,150 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:39,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-05-22 02:24:39,362 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:39,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:39,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1555982684, now seen corresponding path program 229 times [2021-05-22 02:24:39,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:39,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517164764] [2021-05-22 02:24:39,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:39,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:39,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517164764] [2021-05-22 02:24:39,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517164764] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:39,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630876506] [2021-05-22 02:24:39,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:39,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:39,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:39,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630876506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:39,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:39,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:24:39,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070239816] [2021-05-22 02:24:39,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:24:39,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:39,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:24:39,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:24:39,843 INFO L87 Difference]: Start difference. First operand 192 states and 432 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:41,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:41,038 INFO L93 Difference]: Finished difference Result 288 states and 593 transitions. [2021-05-22 02:24:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:24:41,039 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:41,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:41,039 INFO L225 Difference]: With dead ends: 288 [2021-05-22 02:24:41,039 INFO L226 Difference]: Without dead ends: 250 [2021-05-22 02:24:41,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1277.0ms TimeCoverageRelationStatistics Valid=204, Invalid=1356, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:24:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-22 02:24:41,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 193. [2021-05-22 02:24:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.2604166666666665) internal successors, (434), 192 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 434 transitions. [2021-05-22 02:24:41,041 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 434 transitions. Word has length 18 [2021-05-22 02:24:41,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:41,041 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 434 transitions. [2021-05-22 02:24:41,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 434 transitions. [2021-05-22 02:24:41,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:41,041 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:41,041 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:41,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1808 [2021-05-22 02:24:41,249 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:41,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:41,249 INFO L82 PathProgramCache]: Analyzing trace with hash 179489888, now seen corresponding path program 230 times [2021-05-22 02:24:41,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:41,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287739652] [2021-05-22 02:24:41,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:41,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:41,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287739652] [2021-05-22 02:24:41,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287739652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:41,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079622897] [2021-05-22 02:24:41,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:41,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:41,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:41,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:41,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:41,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079622897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:41,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:41,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:41,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794953972] [2021-05-22 02:24:41,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:41,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:41,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:41,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:41,770 INFO L87 Difference]: Start difference. First operand 193 states and 434 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:41,935 INFO L93 Difference]: Finished difference Result 213 states and 463 transitions. [2021-05-22 02:24:41,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:24:41,935 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:41,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:41,935 INFO L225 Difference]: With dead ends: 213 [2021-05-22 02:24:41,935 INFO L226 Difference]: Without dead ends: 200 [2021-05-22 02:24:41,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 460.6ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:24:41,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-22 02:24:41,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 194. [2021-05-22 02:24:41,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.2590673575129534) internal successors, (436), 193 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:41,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 436 transitions. [2021-05-22 02:24:41,940 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 436 transitions. Word has length 18 [2021-05-22 02:24:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:41,940 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 436 transitions. [2021-05-22 02:24:41,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 436 transitions. [2021-05-22 02:24:41,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:41,941 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:41,941 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:42,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1818,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:42,141 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:42,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:42,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1397851842, now seen corresponding path program 231 times [2021-05-22 02:24:42,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:42,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302037424] [2021-05-22 02:24:42,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:42,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:42,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302037424] [2021-05-22 02:24:42,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302037424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:42,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703749020] [2021-05-22 02:24:42,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:42,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:24:42,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:42,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-22 02:24:42,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:42,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703749020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:42,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:42,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:42,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528658631] [2021-05-22 02:24:42,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:42,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:42,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:42,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:42,707 INFO L87 Difference]: Start difference. First operand 194 states and 436 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:43,056 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-05-22 02:24:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:43,787 INFO L93 Difference]: Finished difference Result 277 states and 570 transitions. [2021-05-22 02:24:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:24:43,788 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:43,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:43,788 INFO L225 Difference]: With dead ends: 277 [2021-05-22 02:24:43,788 INFO L226 Difference]: Without dead ends: 259 [2021-05-22 02:24:43,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1340.1ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:24:43,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-05-22 02:24:43,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 196. [2021-05-22 02:24:43,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.2666666666666666) internal successors, (442), 195 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:43,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 442 transitions. [2021-05-22 02:24:43,790 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 442 transitions. Word has length 18 [2021-05-22 02:24:43,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:43,790 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 442 transitions. [2021-05-22 02:24:43,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:43,790 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 442 transitions. [2021-05-22 02:24:43,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:43,790 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:43,790 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:43,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1829,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:43,991 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:43,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:43,991 INFO L82 PathProgramCache]: Analyzing trace with hash -63260512, now seen corresponding path program 232 times [2021-05-22 02:24:43,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:43,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963494857] [2021-05-22 02:24:43,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:43,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:44,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963494857] [2021-05-22 02:24:44,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963494857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846214788] [2021-05-22 02:24:44,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:44,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:44,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:44,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:44,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:44,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846214788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:44,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:44,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:44,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035749233] [2021-05-22 02:24:44,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:44,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:44,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:44,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:44,462 INFO L87 Difference]: Start difference. First operand 196 states and 442 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:45,356 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-05-22 02:24:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:45,497 INFO L93 Difference]: Finished difference Result 271 states and 568 transitions. [2021-05-22 02:24:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:24:45,497 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:45,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:45,497 INFO L225 Difference]: With dead ends: 271 [2021-05-22 02:24:45,497 INFO L226 Difference]: Without dead ends: 252 [2021-05-22 02:24:45,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1178.5ms TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:24:45,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-22 02:24:45,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2021-05-22 02:24:45,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.2653061224489797) internal successors, (444), 196 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:45,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 444 transitions. [2021-05-22 02:24:45,499 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 444 transitions. Word has length 18 [2021-05-22 02:24:45,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:45,499 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 444 transitions. [2021-05-22 02:24:45,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:45,499 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 444 transitions. [2021-05-22 02:24:45,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:45,500 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:45,500 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:45,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1840 [2021-05-22 02:24:45,700 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:45,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:45,700 INFO L82 PathProgramCache]: Analyzing trace with hash -684310339, now seen corresponding path program 233 times [2021-05-22 02:24:45,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:45,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437425191] [2021-05-22 02:24:45,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:24:45,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:45,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437425191] [2021-05-22 02:24:45,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437425191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:45,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063533614] [2021-05-22 02:24:45,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:45,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:24:45,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:45,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-22 02:24:45,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:24:45,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063533614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:45,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:45,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-22 02:24:45,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799662932] [2021-05-22 02:24:45,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-22 02:24:45,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:45,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-22 02:24:45,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-22 02:24:45,920 INFO L87 Difference]: Start difference. First operand 197 states and 444 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:46,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:46,139 INFO L93 Difference]: Finished difference Result 227 states and 502 transitions. [2021-05-22 02:24:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:24:46,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:46,139 INFO L225 Difference]: With dead ends: 227 [2021-05-22 02:24:46,139 INFO L226 Difference]: Without dead ends: 227 [2021-05-22 02:24:46,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:24:46,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-22 02:24:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 196. [2021-05-22 02:24:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.2666666666666666) internal successors, (442), 195 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:46,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 442 transitions. [2021-05-22 02:24:46,141 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 442 transitions. Word has length 18 [2021-05-22 02:24:46,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:46,141 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 442 transitions. [2021-05-22 02:24:46,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 442 transitions. [2021-05-22 02:24:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:46,142 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:46,142 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:46,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1850 [2021-05-22 02:24:46,342 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:46,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:46,342 INFO L82 PathProgramCache]: Analyzing trace with hash -891505576, now seen corresponding path program 234 times [2021-05-22 02:24:46,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:46,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399829455] [2021-05-22 02:24:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:46,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:46,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399829455] [2021-05-22 02:24:46,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399829455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:46,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131612394] [2021-05-22 02:24:46,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:46,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:24:46,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:46,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:46,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:46,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131612394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:46,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:46,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:46,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957228358] [2021-05-22 02:24:46,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:46,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:46,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:46,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:46,863 INFO L87 Difference]: Start difference. First operand 196 states and 442 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:47,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:47,440 INFO L93 Difference]: Finished difference Result 249 states and 526 transitions. [2021-05-22 02:24:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:24:47,441 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:47,441 INFO L225 Difference]: With dead ends: 249 [2021-05-22 02:24:47,441 INFO L226 Difference]: Without dead ends: 224 [2021-05-22 02:24:47,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 802.4ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:24:47,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-22 02:24:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 197. [2021-05-22 02:24:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.2653061224489797) internal successors, (444), 196 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 444 transitions. [2021-05-22 02:24:47,443 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 444 transitions. Word has length 18 [2021-05-22 02:24:47,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:47,443 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 444 transitions. [2021-05-22 02:24:47,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:47,443 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 444 transitions. [2021-05-22 02:24:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:47,443 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:47,443 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:47,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1855 [2021-05-22 02:24:47,644 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:47,644 INFO L82 PathProgramCache]: Analyzing trace with hash -94769824, now seen corresponding path program 235 times [2021-05-22 02:24:47,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:47,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369935781] [2021-05-22 02:24:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:47,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:47,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369935781] [2021-05-22 02:24:47,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369935781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:47,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240498784] [2021-05-22 02:24:47,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:47,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:47,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:48,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240498784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:48,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:48,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:48,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313357323] [2021-05-22 02:24:48,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:48,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:48,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:48,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:48,067 INFO L87 Difference]: Start difference. First operand 197 states and 444 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:48,729 INFO L93 Difference]: Finished difference Result 248 states and 531 transitions. [2021-05-22 02:24:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:24:48,729 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:48,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:48,729 INFO L225 Difference]: With dead ends: 248 [2021-05-22 02:24:48,729 INFO L226 Difference]: Without dead ends: 214 [2021-05-22 02:24:48,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 752.2ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:24:48,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-22 02:24:48,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 194. [2021-05-22 02:24:48,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.2590673575129534) internal successors, (436), 193 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:48,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 436 transitions. [2021-05-22 02:24:48,731 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 436 transitions. Word has length 18 [2021-05-22 02:24:48,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:48,731 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 436 transitions. [2021-05-22 02:24:48,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:48,731 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 436 transitions. [2021-05-22 02:24:48,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:48,731 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:48,732 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:48,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1866,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:48,932 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:48,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1920326782, now seen corresponding path program 236 times [2021-05-22 02:24:48,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:48,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400317386] [2021-05-22 02:24:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:49,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:49,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400317386] [2021-05-22 02:24:49,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400317386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:49,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912021531] [2021-05-22 02:24:49,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:49,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:49,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:49,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:49,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:49,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912021531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:49,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:49,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:49,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372302391] [2021-05-22 02:24:49,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:49,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:49,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:49,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:49,466 INFO L87 Difference]: Start difference. First operand 194 states and 436 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:50,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:50,283 INFO L93 Difference]: Finished difference Result 245 states and 524 transitions. [2021-05-22 02:24:50,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:24:50,284 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:50,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:50,284 INFO L225 Difference]: With dead ends: 245 [2021-05-22 02:24:50,284 INFO L226 Difference]: Without dead ends: 238 [2021-05-22 02:24:50,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 988.1ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:24:50,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-22 02:24:50,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 197. [2021-05-22 02:24:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-05-22 02:24:50,286 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-05-22 02:24:50,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:50,286 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-05-22 02:24:50,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:50,286 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-05-22 02:24:50,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:50,286 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:50,286 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:50,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1876 [2021-05-22 02:24:50,487 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:50,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:50,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1040049184, now seen corresponding path program 237 times [2021-05-22 02:24:50,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:50,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113237401] [2021-05-22 02:24:50,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:50,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:50,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113237401] [2021-05-22 02:24:50,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113237401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:50,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444418832] [2021-05-22 02:24:50,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:50,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:24:50,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:50,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:50,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:50,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444418832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:50,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:50,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:50,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306223213] [2021-05-22 02:24:50,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:50,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:50,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:50,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:50,973 INFO L87 Difference]: Start difference. First operand 197 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:51,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:51,555 INFO L93 Difference]: Finished difference Result 269 states and 557 transitions. [2021-05-22 02:24:51,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:24:51,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:51,556 INFO L225 Difference]: With dead ends: 269 [2021-05-22 02:24:51,556 INFO L226 Difference]: Without dead ends: 250 [2021-05-22 02:24:51,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 774.5ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:24:51,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-22 02:24:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 197. [2021-05-22 02:24:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:51,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-05-22 02:24:51,558 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-05-22 02:24:51,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:51,558 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-05-22 02:24:51,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:51,558 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-05-22 02:24:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:51,558 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:51,559 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:51,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1889,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:51,759 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:51,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:51,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1577904762, now seen corresponding path program 238 times [2021-05-22 02:24:51,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:51,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327178194] [2021-05-22 02:24:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:51,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:51,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327178194] [2021-05-22 02:24:51,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327178194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:51,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995239145] [2021-05-22 02:24:51,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:51,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:24:51,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:51,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:51,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:52,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995239145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:52,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:52,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:52,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109049911] [2021-05-22 02:24:52,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:52,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:52,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:52,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:52,181 INFO L87 Difference]: Start difference. First operand 197 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:52,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:52,813 INFO L93 Difference]: Finished difference Result 264 states and 561 transitions. [2021-05-22 02:24:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:24:52,814 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:52,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:52,814 INFO L225 Difference]: With dead ends: 264 [2021-05-22 02:24:52,814 INFO L226 Difference]: Without dead ends: 245 [2021-05-22 02:24:52,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 709.4ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:24:52,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-22 02:24:52,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 197. [2021-05-22 02:24:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:52,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-05-22 02:24:52,816 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-05-22 02:24:52,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:52,816 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-05-22 02:24:52,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-05-22 02:24:52,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:52,816 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:52,816 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:53,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1902,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:53,017 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:53,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1071558496, now seen corresponding path program 239 times [2021-05-22 02:24:53,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:53,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026445292] [2021-05-22 02:24:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:53,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:53,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026445292] [2021-05-22 02:24:53,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026445292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:53,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45673344] [2021-05-22 02:24:53,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:53,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:24:53,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:53,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:53,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:53,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45673344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:53,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:53,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:53,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572195609] [2021-05-22 02:24:53,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:53,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:53,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:53,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:53,581 INFO L87 Difference]: Start difference. First operand 197 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:54,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:54,131 INFO L93 Difference]: Finished difference Result 262 states and 553 transitions. [2021-05-22 02:24:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:24:54,132 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:54,132 INFO L225 Difference]: With dead ends: 262 [2021-05-22 02:24:54,132 INFO L226 Difference]: Without dead ends: 237 [2021-05-22 02:24:54,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 740.5ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:24:54,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-22 02:24:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 197. [2021-05-22 02:24:54,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.260204081632653) internal successors, (443), 196 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2021-05-22 02:24:54,134 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 18 [2021-05-22 02:24:54,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:54,134 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2021-05-22 02:24:54,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:54,134 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2021-05-22 02:24:54,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:54,134 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:54,134 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:54,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1912 [2021-05-22 02:24:54,335 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:54,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:54,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1107183336, now seen corresponding path program 240 times [2021-05-22 02:24:54,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:54,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75978172] [2021-05-22 02:24:54,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:54,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:54,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75978172] [2021-05-22 02:24:54,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75978172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:54,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218239670] [2021-05-22 02:24:54,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:54,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:24:54,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:54,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-22 02:24:54,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:54,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218239670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:54,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:54,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:54,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320541490] [2021-05-22 02:24:54,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:54,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:54,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:54,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:54,893 INFO L87 Difference]: Start difference. First operand 197 states and 443 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:55,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:55,873 INFO L93 Difference]: Finished difference Result 290 states and 589 transitions. [2021-05-22 02:24:55,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:24:55,873 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:55,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:55,874 INFO L225 Difference]: With dead ends: 290 [2021-05-22 02:24:55,874 INFO L226 Difference]: Without dead ends: 252 [2021-05-22 02:24:55,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1201.3ms TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:24:55,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-22 02:24:55,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 200. [2021-05-22 02:24:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.2562814070351758) internal successors, (449), 199 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 449 transitions. [2021-05-22 02:24:55,876 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 449 transitions. Word has length 18 [2021-05-22 02:24:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:55,876 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 449 transitions. [2021-05-22 02:24:55,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 449 transitions. [2021-05-22 02:24:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:55,876 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:55,876 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:56,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1924,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:56,077 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:56,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:56,077 INFO L82 PathProgramCache]: Analyzing trace with hash -310447584, now seen corresponding path program 241 times [2021-05-22 02:24:56,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:56,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711679966] [2021-05-22 02:24:56,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:56,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:56,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711679966] [2021-05-22 02:24:56,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711679966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:56,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228013903] [2021-05-22 02:24:56,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:56,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:56,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:56,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228013903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:56,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:56,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:56,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287846508] [2021-05-22 02:24:56,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:56,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:56,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:56,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:56,491 INFO L87 Difference]: Start difference. First operand 200 states and 449 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:57,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:57,227 INFO L93 Difference]: Finished difference Result 244 states and 526 transitions. [2021-05-22 02:24:57,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:24:57,227 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:57,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:57,227 INFO L225 Difference]: With dead ends: 244 [2021-05-22 02:24:57,227 INFO L226 Difference]: Without dead ends: 219 [2021-05-22 02:24:57,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 772.4ms TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:24:57,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-22 02:24:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 200. [2021-05-22 02:24:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.2562814070351758) internal successors, (449), 199 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 449 transitions. [2021-05-22 02:24:57,229 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 449 transitions. Word has length 18 [2021-05-22 02:24:57,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:57,229 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 449 transitions. [2021-05-22 02:24:57,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:57,229 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 449 transitions. [2021-05-22 02:24:57,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:57,230 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:57,230 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:57,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1935,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:57,430 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:57,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:57,430 INFO L82 PathProgramCache]: Analyzing trace with hash 195898682, now seen corresponding path program 242 times [2021-05-22 02:24:57,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:57,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493472484] [2021-05-22 02:24:57,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:57,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:57,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493472484] [2021-05-22 02:24:57,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493472484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:57,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883181811] [2021-05-22 02:24:57,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:57,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:24:57,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:57,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:24:57,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:58,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883181811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:58,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:58,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:24:58,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817553107] [2021-05-22 02:24:58,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:24:58,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:58,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:24:58,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:24:58,048 INFO L87 Difference]: Start difference. First operand 200 states and 449 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:24:59,026 INFO L93 Difference]: Finished difference Result 260 states and 563 transitions. [2021-05-22 02:24:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:24:59,026 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:24:59,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:24:59,027 INFO L225 Difference]: With dead ends: 260 [2021-05-22 02:24:59,027 INFO L226 Difference]: Without dead ends: 237 [2021-05-22 02:24:59,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1175.6ms TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:24:59,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-22 02:24:59,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 205. [2021-05-22 02:24:59,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2745098039215685) internal successors, (464), 204 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:59,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 464 transitions. [2021-05-22 02:24:59,029 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 464 transitions. Word has length 18 [2021-05-22 02:24:59,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:24:59,029 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 464 transitions. [2021-05-22 02:24:59,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:24:59,029 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 464 transitions. [2021-05-22 02:24:59,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:24:59,029 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:24:59,029 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:24:59,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1945 [2021-05-22 02:24:59,230 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:24:59,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:24:59,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1287236256, now seen corresponding path program 243 times [2021-05-22 02:24:59,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:24:59,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714279591] [2021-05-22 02:24:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:24:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:24:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:59,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:24:59,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714279591] [2021-05-22 02:24:59,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714279591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:59,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539369698] [2021-05-22 02:24:59,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:24:59,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:24:59,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:24:59,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:24:59,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:24:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:24:59,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539369698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:24:59,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:24:59,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:24:59,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357539447] [2021-05-22 02:24:59,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:24:59,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:24:59,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:24:59,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:24:59,816 INFO L87 Difference]: Start difference. First operand 205 states and 464 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:00,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:00,710 INFO L93 Difference]: Finished difference Result 280 states and 598 transitions. [2021-05-22 02:25:00,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:25:00,710 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:25:00,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:00,710 INFO L225 Difference]: With dead ends: 280 [2021-05-22 02:25:00,710 INFO L226 Difference]: Without dead ends: 261 [2021-05-22 02:25:00,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1075.6ms TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:25:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-22 02:25:00,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 209. [2021-05-22 02:25:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.269230769230769) internal successors, (472), 208 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 472 transitions. [2021-05-22 02:25:00,712 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 472 transitions. Word has length 18 [2021-05-22 02:25:00,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:00,712 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 472 transitions. [2021-05-22 02:25:00,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:00,712 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 472 transitions. [2021-05-22 02:25:00,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:25:00,713 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:00,713 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:00,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1956,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:00,929 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:00,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:00,929 INFO L82 PathProgramCache]: Analyzing trace with hash -682872100, now seen corresponding path program 244 times [2021-05-22 02:25:00,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:00,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375464235] [2021-05-22 02:25:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:01,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:01,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375464235] [2021-05-22 02:25:01,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375464235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:01,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551332749] [2021-05-22 02:25:01,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:01,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:01,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:01,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:25:01,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:01,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551332749] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:01,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:01,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:25:01,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078186751] [2021-05-22 02:25:01,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:25:01,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:01,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:25:01,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:25:01,472 INFO L87 Difference]: Start difference. First operand 209 states and 472 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:02,217 INFO L93 Difference]: Finished difference Result 314 states and 641 transitions. [2021-05-22 02:25:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:25:02,218 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:25:02,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:02,218 INFO L225 Difference]: With dead ends: 314 [2021-05-22 02:25:02,218 INFO L226 Difference]: Without dead ends: 300 [2021-05-22 02:25:02,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 931.2ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:25:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-22 02:25:02,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 210. [2021-05-22 02:25:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.272727272727273) internal successors, (475), 209 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 475 transitions. [2021-05-22 02:25:02,220 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 475 transitions. Word has length 18 [2021-05-22 02:25:02,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:02,220 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 475 transitions. [2021-05-22 02:25:02,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:02,220 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 475 transitions. [2021-05-22 02:25:02,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:25:02,220 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:02,220 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:02,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1968 [2021-05-22 02:25:02,421 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:02,421 INFO L82 PathProgramCache]: Analyzing trace with hash 113863652, now seen corresponding path program 245 times [2021-05-22 02:25:02,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:02,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380656122] [2021-05-22 02:25:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:02,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:02,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380656122] [2021-05-22 02:25:02,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380656122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:02,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889364606] [2021-05-22 02:25:02,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:02,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:25:02,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:02,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:25:02,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:02,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889364606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:02,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:02,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:25:02,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596555877] [2021-05-22 02:25:02,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:25:02,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:02,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:25:02,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:25:02,953 INFO L87 Difference]: Start difference. First operand 210 states and 475 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:03,449 INFO L93 Difference]: Finished difference Result 298 states and 626 transitions. [2021-05-22 02:25:03,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:25:03,449 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:25:03,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:03,449 INFO L225 Difference]: With dead ends: 298 [2021-05-22 02:25:03,449 INFO L226 Difference]: Without dead ends: 269 [2021-05-22 02:25:03,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 714.6ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:25:03,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-22 02:25:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 212. [2021-05-22 02:25:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2701421800947865) internal successors, (479), 211 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 479 transitions. [2021-05-22 02:25:03,451 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 479 transitions. Word has length 18 [2021-05-22 02:25:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:03,451 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 479 transitions. [2021-05-22 02:25:03,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 479 transitions. [2021-05-22 02:25:03,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:25:03,452 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:03,452 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:03,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1981,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:03,657 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash 620209918, now seen corresponding path program 246 times [2021-05-22 02:25:03,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:03,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16136218] [2021-05-22 02:25:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:03,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:03,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16136218] [2021-05-22 02:25:03,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16136218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:03,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96480186] [2021-05-22 02:25:03,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:03,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:25:03,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:03,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-22 02:25:03,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:04,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96480186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:04,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:04,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-22 02:25:04,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480636745] [2021-05-22 02:25:04,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-22 02:25:04,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:04,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-22 02:25:04,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:25:04,242 INFO L87 Difference]: Start difference. First operand 212 states and 479 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:04,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:04,867 INFO L93 Difference]: Finished difference Result 289 states and 611 transitions. [2021-05-22 02:25:04,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:25:04,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:25:04,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:04,868 INFO L225 Difference]: With dead ends: 289 [2021-05-22 02:25:04,868 INFO L226 Difference]: Without dead ends: 251 [2021-05-22 02:25:04,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 813.4ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:25:04,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-22 02:25:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 213. [2021-05-22 02:25:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.268867924528302) internal successors, (481), 212 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:04,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 481 transitions. [2021-05-22 02:25:04,870 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 481 transitions. Word has length 18 [2021-05-22 02:25:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:04,870 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 481 transitions. [2021-05-22 02:25:04,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:04,870 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 481 transitions. [2021-05-22 02:25:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:25:04,870 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:04,870 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:05,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1993 [2021-05-22 02:25:05,071 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:05,071 INFO L82 PathProgramCache]: Analyzing trace with hash -862925020, now seen corresponding path program 247 times [2021-05-22 02:25:05,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:05,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260970417] [2021-05-22 02:25:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:05,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:05,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260970417] [2021-05-22 02:25:05,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260970417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:05,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874984854] [2021-05-22 02:25:05,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:05,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:25:05,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:05,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874984854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:05,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:05,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:25:05,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322487266] [2021-05-22 02:25:05,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:25:05,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:05,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:25:05,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:25:05,647 INFO L87 Difference]: Start difference. First operand 213 states and 481 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:06,171 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-05-22 02:25:06,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:06,829 INFO L93 Difference]: Finished difference Result 327 states and 687 transitions. [2021-05-22 02:25:06,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:25:06,829 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:25:06,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:06,830 INFO L225 Difference]: With dead ends: 327 [2021-05-22 02:25:06,830 INFO L226 Difference]: Without dead ends: 308 [2021-05-22 02:25:06,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1309.5ms TimeCoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:25:06,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-22 02:25:06,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 213. [2021-05-22 02:25:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.268867924528302) internal successors, (481), 212 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:06,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 481 transitions. [2021-05-22 02:25:06,832 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 481 transitions. Word has length 18 [2021-05-22 02:25:06,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:06,832 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 481 transitions. [2021-05-22 02:25:06,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:06,832 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 481 transitions. [2021-05-22 02:25:06,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-22 02:25:06,832 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:06,833 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:07,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2005,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:07,033 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:07,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:07,034 INFO L82 PathProgramCache]: Analyzing trace with hash -17953568, now seen corresponding path program 248 times [2021-05-22 02:25:07,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:07,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649714364] [2021-05-22 02:25:07,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:07,555 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-22 02:25:07,880 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-05-22 02:25:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:08,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:08,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649714364] [2021-05-22 02:25:08,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649714364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:08,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758374583] [2021-05-22 02:25:08,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:08,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:08,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:08,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-22 02:25:08,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:08,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758374583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:08,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:08,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-22 02:25:08,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859982189] [2021-05-22 02:25:08,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-22 02:25:08,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:08,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-22 02:25:08,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:25:08,397 INFO L87 Difference]: Start difference. First operand 213 states and 481 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:09,073 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-05-22 02:25:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:09,888 INFO L93 Difference]: Finished difference Result 333 states and 693 transitions. [2021-05-22 02:25:09,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:25:09,888 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-22 02:25:09,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:09,889 INFO L225 Difference]: With dead ends: 333 [2021-05-22 02:25:09,889 INFO L226 Difference]: Without dead ends: 300 [2021-05-22 02:25:09,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2371.7ms TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:25:09,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-22 02:25:09,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 215. [2021-05-22 02:25:09,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2663551401869158) internal successors, (485), 214 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:09,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 485 transitions. [2021-05-22 02:25:09,891 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 485 transitions. Word has length 18 [2021-05-22 02:25:09,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:09,891 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 485 transitions. [2021-05-22 02:25:09,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:09,891 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 485 transitions. [2021-05-22 02:25:09,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:09,891 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:09,891 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:10,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2015 [2021-05-22 02:25:10,097 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:10,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:10,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1401880791, now seen corresponding path program 249 times [2021-05-22 02:25:10,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:10,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325188882] [2021-05-22 02:25:10,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:10,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:10,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325188882] [2021-05-22 02:25:10,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325188882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:10,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955904734] [2021-05-22 02:25:10,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:10,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:25:10,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:10,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:25:10,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:10,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955904734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:10,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:10,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:10,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605525354] [2021-05-22 02:25:10,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:10,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:10,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:10,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:10,405 INFO L87 Difference]: Start difference. First operand 215 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:10,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:10,662 INFO L93 Difference]: Finished difference Result 278 states and 600 transitions. [2021-05-22 02:25:10,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:25:10,664 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:10,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:10,664 INFO L225 Difference]: With dead ends: 278 [2021-05-22 02:25:10,664 INFO L226 Difference]: Without dead ends: 278 [2021-05-22 02:25:10,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:25:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-22 02:25:10,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 218. [2021-05-22 02:25:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.262672811059908) internal successors, (491), 217 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:10,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 491 transitions. [2021-05-22 02:25:10,666 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 491 transitions. Word has length 19 [2021-05-22 02:25:10,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:10,666 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 491 transitions. [2021-05-22 02:25:10,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:10,666 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 491 transitions. [2021-05-22 02:25:10,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:10,667 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:10,667 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:10,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2025 [2021-05-22 02:25:10,869 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:10,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:10,869 INFO L82 PathProgramCache]: Analyzing trace with hash 357408349, now seen corresponding path program 250 times [2021-05-22 02:25:10,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:10,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138391517] [2021-05-22 02:25:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:10,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:10,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138391517] [2021-05-22 02:25:10,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138391517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:10,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382880657] [2021-05-22 02:25:10,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:10,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:10,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:10,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:10,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:11,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382880657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:11,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:11,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:11,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911328758] [2021-05-22 02:25:11,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:11,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:11,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:11,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:11,144 INFO L87 Difference]: Start difference. First operand 218 states and 491 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:11,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:11,657 INFO L93 Difference]: Finished difference Result 289 states and 622 transitions. [2021-05-22 02:25:11,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:25:11,657 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:11,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:11,658 INFO L225 Difference]: With dead ends: 289 [2021-05-22 02:25:11,658 INFO L226 Difference]: Without dead ends: 289 [2021-05-22 02:25:11,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 532.1ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:25:11,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-05-22 02:25:11,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 218. [2021-05-22 02:25:11,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.262672811059908) internal successors, (491), 217 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:11,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 491 transitions. [2021-05-22 02:25:11,660 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 491 transitions. Word has length 19 [2021-05-22 02:25:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:11,660 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 491 transitions. [2021-05-22 02:25:11,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 491 transitions. [2021-05-22 02:25:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:11,661 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:11,661 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:11,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2029 [2021-05-22 02:25:11,863 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:11,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:11,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1516287333, now seen corresponding path program 251 times [2021-05-22 02:25:11,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:11,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877719779] [2021-05-22 02:25:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:11,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:11,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877719779] [2021-05-22 02:25:11,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877719779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:11,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839563792] [2021-05-22 02:25:11,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:11,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:25:11,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:11,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:11,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:12,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839563792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:12,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:12,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:12,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857265576] [2021-05-22 02:25:12,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:12,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:12,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:12,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:12,158 INFO L87 Difference]: Start difference. First operand 218 states and 491 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:12,709 INFO L93 Difference]: Finished difference Result 286 states and 616 transitions. [2021-05-22 02:25:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:25:12,709 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:12,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:12,710 INFO L225 Difference]: With dead ends: 286 [2021-05-22 02:25:12,710 INFO L226 Difference]: Without dead ends: 286 [2021-05-22 02:25:12,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 582.3ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:25:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-22 02:25:12,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 218. [2021-05-22 02:25:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.262672811059908) internal successors, (491), 217 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:12,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 491 transitions. [2021-05-22 02:25:12,712 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 491 transitions. Word has length 19 [2021-05-22 02:25:12,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:12,712 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 491 transitions. [2021-05-22 02:25:12,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:12,712 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 491 transitions. [2021-05-22 02:25:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:12,712 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:12,712 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:12,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2034 [2021-05-22 02:25:12,913 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:12,913 INFO L82 PathProgramCache]: Analyzing trace with hash 445291869, now seen corresponding path program 252 times [2021-05-22 02:25:12,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:12,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099061153] [2021-05-22 02:25:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:13,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:13,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099061153] [2021-05-22 02:25:13,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099061153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:13,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122178667] [2021-05-22 02:25:13,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:13,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:25:13,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:13,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:13,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:13,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122178667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:13,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:13,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:13,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602613530] [2021-05-22 02:25:13,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:13,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:13,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:13,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:13,229 INFO L87 Difference]: Start difference. First operand 218 states and 491 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:13,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:13,818 INFO L93 Difference]: Finished difference Result 284 states and 612 transitions. [2021-05-22 02:25:13,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:25:13,818 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:13,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:13,818 INFO L225 Difference]: With dead ends: 284 [2021-05-22 02:25:13,818 INFO L226 Difference]: Without dead ends: 284 [2021-05-22 02:25:13,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 633.6ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:25:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-22 02:25:13,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 219. [2021-05-22 02:25:13,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.261467889908257) internal successors, (493), 218 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:13,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 493 transitions. [2021-05-22 02:25:13,821 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 493 transitions. Word has length 19 [2021-05-22 02:25:13,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:13,821 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 493 transitions. [2021-05-22 02:25:13,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:13,821 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 493 transitions. [2021-05-22 02:25:13,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:13,821 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:13,821 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:14,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2039 [2021-05-22 02:25:14,022 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:14,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:14,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1242027621, now seen corresponding path program 253 times [2021-05-22 02:25:14,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:14,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031469643] [2021-05-22 02:25:14,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:14,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:14,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:14,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031469643] [2021-05-22 02:25:14,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031469643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:14,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913942701] [2021-05-22 02:25:14,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:14,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:14,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:14,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913942701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:14,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:14,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:14,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063125009] [2021-05-22 02:25:14,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:14,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:14,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:14,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:14,356 INFO L87 Difference]: Start difference. First operand 219 states and 493 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:14,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:14,983 INFO L93 Difference]: Finished difference Result 285 states and 611 transitions. [2021-05-22 02:25:14,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:25:14,984 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:14,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:14,984 INFO L225 Difference]: With dead ends: 285 [2021-05-22 02:25:14,984 INFO L226 Difference]: Without dead ends: 282 [2021-05-22 02:25:14,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 687.1ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:25:14,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-22 02:25:14,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 220. [2021-05-22 02:25:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-05-22 02:25:14,986 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-05-22 02:25:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:14,986 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-05-22 02:25:14,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-05-22 02:25:14,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:14,986 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:14,987 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:15,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2044,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:15,187 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:15,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:15,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1925543582, now seen corresponding path program 254 times [2021-05-22 02:25:15,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:15,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669230166] [2021-05-22 02:25:15,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:15,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:15,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669230166] [2021-05-22 02:25:15,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669230166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:15,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682192387] [2021-05-22 02:25:15,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:15,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:15,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:15,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:15,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:15,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682192387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:15,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:15,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:15,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5555920] [2021-05-22 02:25:15,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:15,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:15,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:15,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:15,547 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:16,007 INFO L93 Difference]: Finished difference Result 267 states and 578 transitions. [2021-05-22 02:25:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:25:16,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:16,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:16,008 INFO L225 Difference]: With dead ends: 267 [2021-05-22 02:25:16,008 INFO L226 Difference]: Without dead ends: 267 [2021-05-22 02:25:16,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 609.3ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:25:16,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-05-22 02:25:16,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 220. [2021-05-22 02:25:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-05-22 02:25:16,010 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-05-22 02:25:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:16,010 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-05-22 02:25:16,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-05-22 02:25:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:16,010 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:16,010 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:16,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:16,211 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:16,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1418186439, now seen corresponding path program 255 times [2021-05-22 02:25:16,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:16,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522334486] [2021-05-22 02:25:16,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:16,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:16,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522334486] [2021-05-22 02:25:16,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522334486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:16,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392691503] [2021-05-22 02:25:16,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:16,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:25:16,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:16,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:25:16,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:16,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392691503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:16,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:16,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:16,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11747931] [2021-05-22 02:25:16,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:16,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:16,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:16,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:16,485 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:16,819 INFO L93 Difference]: Finished difference Result 252 states and 555 transitions. [2021-05-22 02:25:16,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:25:16,820 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:16,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:16,820 INFO L225 Difference]: With dead ends: 252 [2021-05-22 02:25:16,820 INFO L226 Difference]: Without dead ends: 252 [2021-05-22 02:25:16,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 369.1ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:25:16,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-22 02:25:16,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 220. [2021-05-22 02:25:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:16,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-05-22 02:25:16,822 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-05-22 02:25:16,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:16,822 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-05-22 02:25:16,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-05-22 02:25:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:16,822 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:16,822 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:17,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2059,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:17,023 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:17,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:17,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1717901873, now seen corresponding path program 256 times [2021-05-22 02:25:17,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:17,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786189778] [2021-05-22 02:25:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:17,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:17,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786189778] [2021-05-22 02:25:17,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786189778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:17,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898792883] [2021-05-22 02:25:17,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:17,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:17,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:17,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:17,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:17,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898792883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:17,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:17,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:17,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667985293] [2021-05-22 02:25:17,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:17,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:17,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:17,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:17,333 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:17,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:17,622 INFO L93 Difference]: Finished difference Result 264 states and 579 transitions. [2021-05-22 02:25:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:25:17,622 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:17,622 INFO L225 Difference]: With dead ends: 264 [2021-05-22 02:25:17,622 INFO L226 Difference]: Without dead ends: 264 [2021-05-22 02:25:17,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:25:17,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-22 02:25:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 220. [2021-05-22 02:25:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-05-22 02:25:17,624 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-05-22 02:25:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:17,624 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-05-22 02:25:17,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:17,625 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-05-22 02:25:17,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:17,625 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:17,625 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:17,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2064 [2021-05-22 02:25:17,837 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:17,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:17,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1506069959, now seen corresponding path program 257 times [2021-05-22 02:25:17,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:17,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583994455] [2021-05-22 02:25:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:17,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:17,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583994455] [2021-05-22 02:25:17,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583994455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:17,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493353221] [2021-05-22 02:25:17,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:17,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:25:17,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:17,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:17,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:18,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493353221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:18,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:18,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:18,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105668487] [2021-05-22 02:25:18,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:18,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:18,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:18,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:18,132 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:18,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:18,443 INFO L93 Difference]: Finished difference Result 261 states and 573 transitions. [2021-05-22 02:25:18,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:25:18,443 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:18,444 INFO L225 Difference]: With dead ends: 261 [2021-05-22 02:25:18,444 INFO L226 Difference]: Without dead ends: 261 [2021-05-22 02:25:18,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 375.0ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:25:18,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-22 02:25:18,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 220. [2021-05-22 02:25:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:18,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-05-22 02:25:18,446 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-05-22 02:25:18,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:18,446 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-05-22 02:25:18,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:18,446 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-05-22 02:25:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:18,446 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:18,446 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:18,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2069 [2021-05-22 02:25:18,647 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:18,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:18,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1992161585, now seen corresponding path program 258 times [2021-05-22 02:25:18,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:18,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348805092] [2021-05-22 02:25:18,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:18,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:18,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348805092] [2021-05-22 02:25:18,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348805092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:18,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713791633] [2021-05-22 02:25:18,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:18,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:25:18,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:18,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:18,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:18,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713791633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:18,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:18,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:18,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128726531] [2021-05-22 02:25:18,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:18,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:18,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:18,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:18,992 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:19,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:19,343 INFO L93 Difference]: Finished difference Result 258 states and 567 transitions. [2021-05-22 02:25:19,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:25:19,343 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:19,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:19,344 INFO L225 Difference]: With dead ends: 258 [2021-05-22 02:25:19,344 INFO L226 Difference]: Without dead ends: 258 [2021-05-22 02:25:19,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 429.7ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:25:19,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-22 02:25:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 220. [2021-05-22 02:25:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-05-22 02:25:19,346 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-05-22 02:25:19,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:19,346 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-05-22 02:25:19,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:19,346 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-05-22 02:25:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:19,346 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:19,346 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:19,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2074,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:19,550 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:19,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:19,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1704611350, now seen corresponding path program 259 times [2021-05-22 02:25:19,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:19,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427441401] [2021-05-22 02:25:19,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:19,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:19,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427441401] [2021-05-22 02:25:19,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427441401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:19,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759841218] [2021-05-22 02:25:19,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:19,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:19,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:19,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759841218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:19,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:19,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:19,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959593082] [2021-05-22 02:25:19,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:19,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:19,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:19,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:19,927 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:20,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:20,172 INFO L93 Difference]: Finished difference Result 243 states and 539 transitions. [2021-05-22 02:25:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:25:20,172 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:20,172 INFO L225 Difference]: With dead ends: 243 [2021-05-22 02:25:20,172 INFO L226 Difference]: Without dead ends: 243 [2021-05-22 02:25:20,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 396.3ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:25:20,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-22 02:25:20,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 215. [2021-05-22 02:25:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:20,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-05-22 02:25:20,174 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-05-22 02:25:20,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:20,174 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-05-22 02:25:20,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:20,175 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-05-22 02:25:20,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:20,175 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:20,175 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:20,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2081,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:20,375 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:20,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:20,376 INFO L82 PathProgramCache]: Analyzing trace with hash -450444695, now seen corresponding path program 260 times [2021-05-22 02:25:20,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:20,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134824969] [2021-05-22 02:25:20,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:20,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:20,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134824969] [2021-05-22 02:25:20,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134824969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:20,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906429645] [2021-05-22 02:25:20,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:20,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:20,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:20,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:20,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:20,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:20,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906429645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:20,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:20,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:20,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480297714] [2021-05-22 02:25:20,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:20,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:20,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:20,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:20,674 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:20,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:20,866 INFO L93 Difference]: Finished difference Result 254 states and 557 transitions. [2021-05-22 02:25:20,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:25:20,866 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:20,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:20,867 INFO L225 Difference]: With dead ends: 254 [2021-05-22 02:25:20,867 INFO L226 Difference]: Without dead ends: 254 [2021-05-22 02:25:20,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:25:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-22 02:25:20,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 217. [2021-05-22 02:25:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2546296296296298) internal successors, (487), 216 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 487 transitions. [2021-05-22 02:25:20,869 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 487 transitions. Word has length 19 [2021-05-22 02:25:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:20,869 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 487 transitions. [2021-05-22 02:25:20,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 487 transitions. [2021-05-22 02:25:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:20,869 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:20,869 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:21,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2089 [2021-05-22 02:25:21,070 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:21,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:21,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1521440159, now seen corresponding path program 261 times [2021-05-22 02:25:21,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:21,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387522405] [2021-05-22 02:25:21,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:21,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:21,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387522405] [2021-05-22 02:25:21,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387522405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:21,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139026145] [2021-05-22 02:25:21,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:21,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:25:21,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:21,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:21,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:21,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139026145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:21,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:21,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:21,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813314782] [2021-05-22 02:25:21,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:21,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:21,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:21,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:21,352 INFO L87 Difference]: Start difference. First operand 217 states and 487 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:21,779 INFO L93 Difference]: Finished difference Result 266 states and 581 transitions. [2021-05-22 02:25:21,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:25:21,779 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:21,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:21,780 INFO L225 Difference]: With dead ends: 266 [2021-05-22 02:25:21,780 INFO L226 Difference]: Without dead ends: 266 [2021-05-22 02:25:21,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 443.5ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:25:21,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-22 02:25:21,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 219. [2021-05-22 02:25:21,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.261467889908257) internal successors, (493), 218 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:21,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 493 transitions. [2021-05-22 02:25:21,782 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 493 transitions. Word has length 19 [2021-05-22 02:25:21,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:21,782 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 493 transitions. [2021-05-22 02:25:21,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:21,782 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 493 transitions. [2021-05-22 02:25:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:21,782 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:21,782 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:21,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2094,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:21,983 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:21,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:21,983 INFO L82 PathProgramCache]: Analyzing trace with hash -724704407, now seen corresponding path program 262 times [2021-05-22 02:25:21,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:21,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420788627] [2021-05-22 02:25:21,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:22,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:22,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420788627] [2021-05-22 02:25:22,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420788627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:22,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019746392] [2021-05-22 02:25:22,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:22,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:22,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:22,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:22,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:22,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019746392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:22,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:22,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:22,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301702355] [2021-05-22 02:25:22,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:22,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:22,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:22,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:22,286 INFO L87 Difference]: Start difference. First operand 219 states and 493 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:22,551 INFO L93 Difference]: Finished difference Result 260 states and 571 transitions. [2021-05-22 02:25:22,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:25:22,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:22,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:22,552 INFO L225 Difference]: With dead ends: 260 [2021-05-22 02:25:22,552 INFO L226 Difference]: Without dead ends: 260 [2021-05-22 02:25:22,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:25:22,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-22 02:25:22,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 221. [2021-05-22 02:25:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2590909090909093) internal successors, (497), 220 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 497 transitions. [2021-05-22 02:25:22,554 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 497 transitions. Word has length 19 [2021-05-22 02:25:22,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:22,554 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 497 transitions. [2021-05-22 02:25:22,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:22,554 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 497 transitions. [2021-05-22 02:25:22,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:22,554 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:22,554 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:22,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2099,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:22,755 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:22,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:22,755 INFO L82 PathProgramCache]: Analyzing trace with hash -437154172, now seen corresponding path program 263 times [2021-05-22 02:25:22,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:22,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5698829] [2021-05-22 02:25:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:22,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:22,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5698829] [2021-05-22 02:25:22,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5698829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:22,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354524280] [2021-05-22 02:25:22,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:22,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:25:22,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:22,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:22,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:23,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354524280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:23,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:23,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:23,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472727817] [2021-05-22 02:25:23,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:23,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:23,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:23,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:23,075 INFO L87 Difference]: Start difference. First operand 221 states and 497 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:23,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:23,348 INFO L93 Difference]: Finished difference Result 252 states and 556 transitions. [2021-05-22 02:25:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:25:23,348 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:23,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:23,349 INFO L225 Difference]: With dead ends: 252 [2021-05-22 02:25:23,349 INFO L226 Difference]: Without dead ends: 252 [2021-05-22 02:25:23,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 373.0ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:25:23,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-22 02:25:23,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 217. [2021-05-22 02:25:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2546296296296298) internal successors, (487), 216 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 487 transitions. [2021-05-22 02:25:23,351 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 487 transitions. Word has length 19 [2021-05-22 02:25:23,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:23,351 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 487 transitions. [2021-05-22 02:25:23,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:23,351 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 487 transitions. [2021-05-22 02:25:23,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:23,351 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:23,351 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:23,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2106 [2021-05-22 02:25:23,551 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:23,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:23,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1290392199, now seen corresponding path program 264 times [2021-05-22 02:25:23,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:23,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227582332] [2021-05-22 02:25:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:23,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:23,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227582332] [2021-05-22 02:25:23,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227582332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:23,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063910429] [2021-05-22 02:25:23,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:23,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:25:23,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:23,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:23,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:23,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063910429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:23,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:23,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:23,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736086151] [2021-05-22 02:25:23,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:23,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:23,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:23,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:23,848 INFO L87 Difference]: Start difference. First operand 217 states and 487 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:24,148 INFO L93 Difference]: Finished difference Result 255 states and 559 transitions. [2021-05-22 02:25:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:25:24,149 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:24,149 INFO L225 Difference]: With dead ends: 255 [2021-05-22 02:25:24,149 INFO L226 Difference]: Without dead ends: 255 [2021-05-22 02:25:24,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:25:24,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-22 02:25:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 219. [2021-05-22 02:25:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.2522935779816513) internal successors, (491), 218 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 491 transitions. [2021-05-22 02:25:24,151 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 491 transitions. Word has length 19 [2021-05-22 02:25:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:24,151 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 491 transitions. [2021-05-22 02:25:24,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:24,151 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 491 transitions. [2021-05-22 02:25:24,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:24,152 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:24,152 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:24,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2114 [2021-05-22 02:25:24,352 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:24,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:24,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2087127951, now seen corresponding path program 265 times [2021-05-22 02:25:24,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:24,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788624801] [2021-05-22 02:25:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:24,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:24,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788624801] [2021-05-22 02:25:24,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788624801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:24,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472536662] [2021-05-22 02:25:24,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:24,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:24,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:24,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472536662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:24,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:24,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:24,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021690526] [2021-05-22 02:25:24,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:24,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:24,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:24,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:24,694 INFO L87 Difference]: Start difference. First operand 219 states and 491 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:25,059 INFO L93 Difference]: Finished difference Result 261 states and 571 transitions. [2021-05-22 02:25:25,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:25:25,059 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:25,059 INFO L225 Difference]: With dead ends: 261 [2021-05-22 02:25:25,059 INFO L226 Difference]: Without dead ends: 261 [2021-05-22 02:25:25,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 397.7ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:25:25,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-22 02:25:25,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 220. [2021-05-22 02:25:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2511415525114153) internal successors, (493), 219 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:25,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 493 transitions. [2021-05-22 02:25:25,062 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 493 transitions. Word has length 19 [2021-05-22 02:25:25,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:25,062 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 493 transitions. [2021-05-22 02:25:25,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:25,062 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 493 transitions. [2021-05-22 02:25:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:25,062 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:25,062 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:25,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2119 [2021-05-22 02:25:25,263 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:25,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:25,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1920289110, now seen corresponding path program 266 times [2021-05-22 02:25:25,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:25,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234019710] [2021-05-22 02:25:25,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:25,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:25,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234019710] [2021-05-22 02:25:25,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234019710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:25,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527065984] [2021-05-22 02:25:25,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:25,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:25,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:25,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:25,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:25,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527065984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:25,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:25,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:25,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529627171] [2021-05-22 02:25:25,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:25,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:25,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:25,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:25,619 INFO L87 Difference]: Start difference. First operand 220 states and 493 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:26,001 INFO L93 Difference]: Finished difference Result 256 states and 561 transitions. [2021-05-22 02:25:26,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:25:26,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:26,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:26,001 INFO L225 Difference]: With dead ends: 256 [2021-05-22 02:25:26,001 INFO L226 Difference]: Without dead ends: 256 [2021-05-22 02:25:26,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 470.2ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:25:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-22 02:25:26,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 218. [2021-05-22 02:25:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2534562211981566) internal successors, (489), 217 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 489 transitions. [2021-05-22 02:25:26,003 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 489 transitions. Word has length 19 [2021-05-22 02:25:26,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:26,003 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 489 transitions. [2021-05-22 02:25:26,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:26,003 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 489 transitions. [2021-05-22 02:25:26,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:26,004 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:26,004 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:26,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2126,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:26,204 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:26,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:26,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1701493079, now seen corresponding path program 267 times [2021-05-22 02:25:26,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:26,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130650025] [2021-05-22 02:25:26,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:26,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:26,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130650025] [2021-05-22 02:25:26,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130650025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:26,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136493118] [2021-05-22 02:25:26,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:26,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:25:26,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:26,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:26,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:26,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136493118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:26,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:26,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:26,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105484071] [2021-05-22 02:25:26,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:26,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:26,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:26,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:26,573 INFO L87 Difference]: Start difference. First operand 218 states and 489 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:27,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:27,152 INFO L93 Difference]: Finished difference Result 285 states and 602 transitions. [2021-05-22 02:25:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:25:27,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:27,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:27,153 INFO L225 Difference]: With dead ends: 285 [2021-05-22 02:25:27,153 INFO L226 Difference]: Without dead ends: 285 [2021-05-22 02:25:27,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 696.1ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:25:27,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-22 02:25:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 231. [2021-05-22 02:25:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.234782608695652) internal successors, (514), 230 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:27,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 514 transitions. [2021-05-22 02:25:27,155 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 514 transitions. Word has length 19 [2021-05-22 02:25:27,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:27,155 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 514 transitions. [2021-05-22 02:25:27,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:27,155 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 514 transitions. [2021-05-22 02:25:27,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:27,155 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:27,155 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:27,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2134 [2021-05-22 02:25:27,356 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:27,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:27,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1413942844, now seen corresponding path program 268 times [2021-05-22 02:25:27,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:27,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297005838] [2021-05-22 02:25:27,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:27,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:27,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297005838] [2021-05-22 02:25:27,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297005838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:27,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018338894] [2021-05-22 02:25:27,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:27,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:27,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:27,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:27,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:27,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018338894] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:27,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:27,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:27,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843162993] [2021-05-22 02:25:27,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:27,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:27,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:27,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:27,652 INFO L87 Difference]: Start difference. First operand 231 states and 514 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:28,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:28,163 INFO L93 Difference]: Finished difference Result 337 states and 704 transitions. [2021-05-22 02:25:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:25:28,163 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:28,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:28,163 INFO L225 Difference]: With dead ends: 337 [2021-05-22 02:25:28,164 INFO L226 Difference]: Without dead ends: 337 [2021-05-22 02:25:28,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:25:28,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-22 02:25:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 232. [2021-05-22 02:25:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.2467532467532467) internal successors, (519), 231 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 519 transitions. [2021-05-22 02:25:28,166 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 519 transitions. Word has length 19 [2021-05-22 02:25:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:28,166 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 519 transitions. [2021-05-22 02:25:28,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 519 transitions. [2021-05-22 02:25:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:28,166 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:28,166 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:28,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2142,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:28,367 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:28,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:28,367 INFO L82 PathProgramCache]: Analyzing trace with hash 920989127, now seen corresponding path program 269 times [2021-05-22 02:25:28,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:28,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230755442] [2021-05-22 02:25:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:28,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:28,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230755442] [2021-05-22 02:25:28,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230755442] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:28,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646353654] [2021-05-22 02:25:28,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:28,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:25:28,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:28,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:28,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:28,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646353654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:28,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:28,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:28,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946498979] [2021-05-22 02:25:28,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:28,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:28,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:28,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:28,805 INFO L87 Difference]: Start difference. First operand 232 states and 519 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:29,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:29,119 INFO L93 Difference]: Finished difference Result 253 states and 555 transitions. [2021-05-22 02:25:29,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:25:29,119 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:29,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:29,119 INFO L225 Difference]: With dead ends: 253 [2021-05-22 02:25:29,119 INFO L226 Difference]: Without dead ends: 247 [2021-05-22 02:25:29,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 503.8ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:25:29,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-22 02:25:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 223. [2021-05-22 02:25:29,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.265765765765766) internal successors, (503), 222 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:29,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 503 transitions. [2021-05-22 02:25:29,121 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 503 transitions. Word has length 19 [2021-05-22 02:25:29,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:29,121 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 503 transitions. [2021-05-22 02:25:29,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:29,122 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 503 transitions. [2021-05-22 02:25:29,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:29,122 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:29,122 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:29,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2149,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:29,322 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:29,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1111952564, now seen corresponding path program 270 times [2021-05-22 02:25:29,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:29,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032531672] [2021-05-22 02:25:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:29,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:29,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:29,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032531672] [2021-05-22 02:25:29,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032531672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:29,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975337649] [2021-05-22 02:25:29,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:29,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:25:29,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:29,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:29,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:29,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975337649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:29,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:29,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:29,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771626352] [2021-05-22 02:25:29,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:29,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:29,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:29,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:29,650 INFO L87 Difference]: Start difference. First operand 223 states and 503 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:30,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:30,027 INFO L93 Difference]: Finished difference Result 279 states and 607 transitions. [2021-05-22 02:25:30,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:25:30,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:30,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:30,027 INFO L225 Difference]: With dead ends: 279 [2021-05-22 02:25:30,027 INFO L226 Difference]: Without dead ends: 279 [2021-05-22 02:25:30,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 419.7ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:25:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-05-22 02:25:30,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 221. [2021-05-22 02:25:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2545454545454544) internal successors, (496), 220 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:30,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 496 transitions. [2021-05-22 02:25:30,030 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 496 transitions. Word has length 19 [2021-05-22 02:25:30,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:30,030 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 496 transitions. [2021-05-22 02:25:30,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:30,030 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 496 transitions. [2021-05-22 02:25:30,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:30,030 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:30,030 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:30,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2157 [2021-05-22 02:25:30,230 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:30,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:30,231 INFO L82 PathProgramCache]: Analyzing trace with hash -57431139, now seen corresponding path program 271 times [2021-05-22 02:25:30,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:30,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339990996] [2021-05-22 02:25:30,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:30,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:30,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339990996] [2021-05-22 02:25:30,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339990996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:30,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568518309] [2021-05-22 02:25:30,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:30,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:30,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:30,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568518309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:30,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:30,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:30,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138002079] [2021-05-22 02:25:30,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:30,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:30,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:30,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:30,509 INFO L87 Difference]: Start difference. First operand 221 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:30,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:30,811 INFO L93 Difference]: Finished difference Result 247 states and 546 transitions. [2021-05-22 02:25:30,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:25:30,812 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:30,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:30,812 INFO L225 Difference]: With dead ends: 247 [2021-05-22 02:25:30,812 INFO L226 Difference]: Without dead ends: 247 [2021-05-22 02:25:30,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 354.1ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:25:30,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-22 02:25:30,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2021-05-22 02:25:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.253393665158371) internal successors, (498), 221 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 498 transitions. [2021-05-22 02:25:30,814 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 498 transitions. Word has length 19 [2021-05-22 02:25:30,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:30,814 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 498 transitions. [2021-05-22 02:25:30,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:30,814 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 498 transitions. [2021-05-22 02:25:30,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:30,814 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:30,814 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:31,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2162,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:31,015 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:31,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:31,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1101447845, now seen corresponding path program 272 times [2021-05-22 02:25:31,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:31,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216009384] [2021-05-22 02:25:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:31,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:31,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216009384] [2021-05-22 02:25:31,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216009384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:31,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438303859] [2021-05-22 02:25:31,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:31,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:31,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:31,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:25:31,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:31,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438303859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:31,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:31,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:31,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658316809] [2021-05-22 02:25:31,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:31,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:31,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:31,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:31,378 INFO L87 Difference]: Start difference. First operand 222 states and 498 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:31,928 INFO L93 Difference]: Finished difference Result 261 states and 574 transitions. [2021-05-22 02:25:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:25:31,928 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:31,929 INFO L225 Difference]: With dead ends: 261 [2021-05-22 02:25:31,929 INFO L226 Difference]: Without dead ends: 261 [2021-05-22 02:25:31,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 709.7ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:25:31,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-22 02:25:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 223. [2021-05-22 02:25:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.2522522522522523) internal successors, (500), 222 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:31,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 500 transitions. [2021-05-22 02:25:31,931 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 500 transitions. Word has length 19 [2021-05-22 02:25:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:31,931 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 500 transitions. [2021-05-22 02:25:31,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 500 transitions. [2021-05-22 02:25:31,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:31,931 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:31,931 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:32,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2167 [2021-05-22 02:25:32,132 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:32,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:32,132 INFO L82 PathProgramCache]: Analyzing trace with hash 30452381, now seen corresponding path program 273 times [2021-05-22 02:25:32,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:32,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820295758] [2021-05-22 02:25:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:32,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:32,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820295758] [2021-05-22 02:25:32,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820295758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:32,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854770154] [2021-05-22 02:25:32,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:32,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:25:32,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:32,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-22 02:25:32,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:32,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854770154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:32,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:32,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-05-22 02:25:32,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117388128] [2021-05-22 02:25:32,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:25:32,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:32,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:25:32,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:25:32,601 INFO L87 Difference]: Start difference. First operand 223 states and 500 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:33,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:33,218 INFO L93 Difference]: Finished difference Result 270 states and 592 transitions. [2021-05-22 02:25:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:25:33,218 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:33,218 INFO L225 Difference]: With dead ends: 270 [2021-05-22 02:25:33,218 INFO L226 Difference]: Without dead ends: 270 [2021-05-22 02:25:33,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 777.3ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:25:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-22 02:25:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 224. [2021-05-22 02:25:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2511210762331837) internal successors, (502), 223 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:33,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 502 transitions. [2021-05-22 02:25:33,221 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 502 transitions. Word has length 19 [2021-05-22 02:25:33,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:33,221 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 502 transitions. [2021-05-22 02:25:33,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 502 transitions. [2021-05-22 02:25:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:33,221 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:33,221 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:33,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2171,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:33,422 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:33,422 INFO L82 PathProgramCache]: Analyzing trace with hash 827188133, now seen corresponding path program 274 times [2021-05-22 02:25:33,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:33,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310198718] [2021-05-22 02:25:33,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:33,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:33,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310198718] [2021-05-22 02:25:33,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310198718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:33,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807598347] [2021-05-22 02:25:33,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:33,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:33,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:33,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:33,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:33,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807598347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:33,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:33,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:33,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095550044] [2021-05-22 02:25:33,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:33,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:33,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:33,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:33,727 INFO L87 Difference]: Start difference. First operand 224 states and 502 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:34,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:34,530 INFO L93 Difference]: Finished difference Result 294 states and 627 transitions. [2021-05-22 02:25:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:25:34,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:34,531 INFO L225 Difference]: With dead ends: 294 [2021-05-22 02:25:34,531 INFO L226 Difference]: Without dead ends: 294 [2021-05-22 02:25:34,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 825.8ms TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:25:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-22 02:25:34,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 225. [2021-05-22 02:25:34,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2589285714285716) internal successors, (506), 224 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:34,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 506 transitions. [2021-05-22 02:25:34,533 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 506 transitions. Word has length 19 [2021-05-22 02:25:34,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:34,533 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 506 transitions. [2021-05-22 02:25:34,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:34,533 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 506 transitions. [2021-05-22 02:25:34,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:34,534 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:34,534 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:34,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2177 [2021-05-22 02:25:34,734 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:34,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1303499579, now seen corresponding path program 275 times [2021-05-22 02:25:34,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:34,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517181901] [2021-05-22 02:25:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:34,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:34,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517181901] [2021-05-22 02:25:34,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517181901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:34,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880133289] [2021-05-22 02:25:34,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:34,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:25:34,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:34,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:34,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:35,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880133289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:35,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:35,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:35,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115953386] [2021-05-22 02:25:35,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:35,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:35,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:35,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:35,037 INFO L87 Difference]: Start difference. First operand 225 states and 506 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:35,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:35,568 INFO L93 Difference]: Finished difference Result 261 states and 570 transitions. [2021-05-22 02:25:35,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:25:35,568 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:35,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:35,568 INFO L225 Difference]: With dead ends: 261 [2021-05-22 02:25:35,568 INFO L226 Difference]: Without dead ends: 258 [2021-05-22 02:25:35,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 579.9ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:25:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-22 02:25:35,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 225. [2021-05-22 02:25:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2544642857142856) internal successors, (505), 224 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 505 transitions. [2021-05-22 02:25:35,570 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 505 transitions. Word has length 19 [2021-05-22 02:25:35,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:35,570 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 505 transitions. [2021-05-22 02:25:35,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:35,570 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 505 transitions. [2021-05-22 02:25:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:35,571 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:35,571 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:35,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2184 [2021-05-22 02:25:35,771 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1954584226, now seen corresponding path program 276 times [2021-05-22 02:25:35,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:35,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558526187] [2021-05-22 02:25:35,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:35,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:35,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558526187] [2021-05-22 02:25:35,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558526187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:35,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012509565] [2021-05-22 02:25:35,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:35,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:25:35,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:35,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:35,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:36,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012509565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:36,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:36,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:36,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644391935] [2021-05-22 02:25:36,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:36,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:36,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:36,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:36,129 INFO L87 Difference]: Start difference. First operand 225 states and 505 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:36,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:36,439 INFO L93 Difference]: Finished difference Result 245 states and 540 transitions. [2021-05-22 02:25:36,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:25:36,439 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:36,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:36,439 INFO L225 Difference]: With dead ends: 245 [2021-05-22 02:25:36,439 INFO L226 Difference]: Without dead ends: 243 [2021-05-22 02:25:36,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 418.9ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:25:36,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-22 02:25:36,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2021-05-22 02:25:36,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2545454545454544) internal successors, (496), 220 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 496 transitions. [2021-05-22 02:25:36,441 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 496 transitions. Word has length 19 [2021-05-22 02:25:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:36,441 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 496 transitions. [2021-05-22 02:25:36,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:36,442 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 496 transitions. [2021-05-22 02:25:36,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:36,442 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:36,442 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:36,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2192,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:36,642 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:36,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1926062273, now seen corresponding path program 277 times [2021-05-22 02:25:36,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:36,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426891533] [2021-05-22 02:25:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:36,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:36,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426891533] [2021-05-22 02:25:36,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426891533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:36,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318306616] [2021-05-22 02:25:36,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:36,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:36,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:36,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318306616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:36,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:36,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:36,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275520212] [2021-05-22 02:25:36,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:36,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:36,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:36,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:36,930 INFO L87 Difference]: Start difference. First operand 221 states and 496 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:37,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:37,101 INFO L93 Difference]: Finished difference Result 256 states and 562 transitions. [2021-05-22 02:25:37,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:25:37,102 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:37,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:37,102 INFO L225 Difference]: With dead ends: 256 [2021-05-22 02:25:37,102 INFO L226 Difference]: Without dead ends: 256 [2021-05-22 02:25:37,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 247.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:37,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-22 02:25:37,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 219. [2021-05-22 02:25:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.2477064220183487) internal successors, (490), 218 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 490 transitions. [2021-05-22 02:25:37,104 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 490 transitions. Word has length 19 [2021-05-22 02:25:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:37,104 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 490 transitions. [2021-05-22 02:25:37,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 490 transitions. [2021-05-22 02:25:37,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:37,105 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:37,105 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:37,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2200 [2021-05-22 02:25:37,320 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:37,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:37,320 INFO L82 PathProgramCache]: Analyzing trace with hash 2094645311, now seen corresponding path program 278 times [2021-05-22 02:25:37,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:37,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889089864] [2021-05-22 02:25:37,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:37,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:37,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:37,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889089864] [2021-05-22 02:25:37,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889089864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:37,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054717140] [2021-05-22 02:25:37,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:37,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:37,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:37,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:37,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:37,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054717140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:37,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:37,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:37,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937153231] [2021-05-22 02:25:37,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:37,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:37,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:37,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:37,679 INFO L87 Difference]: Start difference. First operand 219 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:38,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:38,128 INFO L93 Difference]: Finished difference Result 263 states and 576 transitions. [2021-05-22 02:25:38,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:25:38,129 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:38,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:38,129 INFO L225 Difference]: With dead ends: 263 [2021-05-22 02:25:38,129 INFO L226 Difference]: Without dead ends: 263 [2021-05-22 02:25:38,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:25:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-05-22 02:25:38,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 216. [2021-05-22 02:25:38,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.2511627906976743) internal successors, (484), 215 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 484 transitions. [2021-05-22 02:25:38,131 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 484 transitions. Word has length 19 [2021-05-22 02:25:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:38,131 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 484 transitions. [2021-05-22 02:25:38,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:38,132 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 484 transitions. [2021-05-22 02:25:38,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:38,132 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:38,132 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:38,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2205,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:38,332 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:38,333 INFO L82 PathProgramCache]: Analyzing trace with hash -554628451, now seen corresponding path program 279 times [2021-05-22 02:25:38,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:38,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219894948] [2021-05-22 02:25:38,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:38,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:38,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219894948] [2021-05-22 02:25:38,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219894948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:38,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438209831] [2021-05-22 02:25:38,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:38,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:25:38,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:38,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:38,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438209831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:38,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:38,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:38,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142846287] [2021-05-22 02:25:38,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:38,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:38,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:38,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:38,709 INFO L87 Difference]: Start difference. First operand 216 states and 484 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:38,952 INFO L93 Difference]: Finished difference Result 240 states and 525 transitions. [2021-05-22 02:25:38,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:25:38,953 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:38,953 INFO L225 Difference]: With dead ends: 240 [2021-05-22 02:25:38,953 INFO L226 Difference]: Without dead ends: 234 [2021-05-22 02:25:38,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 403.6ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:25:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-22 02:25:38,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 212. [2021-05-22 02:25:38,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.251184834123223) internal successors, (475), 211 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 475 transitions. [2021-05-22 02:25:38,955 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 475 transitions. Word has length 19 [2021-05-22 02:25:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:38,955 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 475 transitions. [2021-05-22 02:25:38,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 475 transitions. [2021-05-22 02:25:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:38,955 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:38,955 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:39,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-05-22 02:25:39,156 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:39,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:39,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1289595419, now seen corresponding path program 280 times [2021-05-22 02:25:39,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:39,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101774864] [2021-05-22 02:25:39,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:39,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:39,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101774864] [2021-05-22 02:25:39,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101774864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:39,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884055353] [2021-05-22 02:25:39,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:39,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:39,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:39,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:39,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:39,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884055353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:39,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:39,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:39,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336711672] [2021-05-22 02:25:39,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:39,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:39,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:39,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:39,445 INFO L87 Difference]: Start difference. First operand 212 states and 475 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:39,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:39,559 INFO L93 Difference]: Finished difference Result 245 states and 539 transitions. [2021-05-22 02:25:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:25:39,559 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:39,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:39,559 INFO L225 Difference]: With dead ends: 245 [2021-05-22 02:25:39,560 INFO L226 Difference]: Without dead ends: 245 [2021-05-22 02:25:39,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:39,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-22 02:25:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 213. [2021-05-22 02:25:39,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.25) internal successors, (477), 212 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 477 transitions. [2021-05-22 02:25:39,561 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 477 transitions. Word has length 19 [2021-05-22 02:25:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:39,562 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 477 transitions. [2021-05-22 02:25:39,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 477 transitions. [2021-05-22 02:25:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:39,562 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:39,562 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:39,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2220,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:39,762 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:39,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1934376413, now seen corresponding path program 281 times [2021-05-22 02:25:39,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:39,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869006335] [2021-05-22 02:25:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:39,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:39,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869006335] [2021-05-22 02:25:39,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869006335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:39,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051043383] [2021-05-22 02:25:39,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:39,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:25:39,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:39,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:39,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:40,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:40,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051043383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:40,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:40,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:40,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090798158] [2021-05-22 02:25:40,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:40,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:40,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:40,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:40,056 INFO L87 Difference]: Start difference. First operand 213 states and 477 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:40,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:40,408 INFO L93 Difference]: Finished difference Result 260 states and 569 transitions. [2021-05-22 02:25:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:25:40,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:40,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:40,408 INFO L225 Difference]: With dead ends: 260 [2021-05-22 02:25:40,408 INFO L226 Difference]: Without dead ends: 260 [2021-05-22 02:25:40,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 399.0ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:25:40,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-22 02:25:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 214. [2021-05-22 02:25:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.248826291079812) internal successors, (479), 213 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:40,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 479 transitions. [2021-05-22 02:25:40,410 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 479 transitions. Word has length 19 [2021-05-22 02:25:40,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:40,410 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 479 transitions. [2021-05-22 02:25:40,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 479 transitions. [2021-05-22 02:25:40,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:40,411 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:40,411 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:40,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2225 [2021-05-22 02:25:40,611 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:40,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1563855131, now seen corresponding path program 282 times [2021-05-22 02:25:40,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:40,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408611652] [2021-05-22 02:25:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:40,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:40,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408611652] [2021-05-22 02:25:40,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408611652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:40,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455842742] [2021-05-22 02:25:40,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:40,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:25:40,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:40,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:40,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:40,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455842742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:40,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:40,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:40,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203685007] [2021-05-22 02:25:40,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:40,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:40,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:40,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:40,907 INFO L87 Difference]: Start difference. First operand 214 states and 479 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:41,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:41,438 INFO L93 Difference]: Finished difference Result 283 states and 608 transitions. [2021-05-22 02:25:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:25:41,438 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:41,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:41,439 INFO L225 Difference]: With dead ends: 283 [2021-05-22 02:25:41,439 INFO L226 Difference]: Without dead ends: 283 [2021-05-22 02:25:41,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 537.1ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:25:41,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-22 02:25:41,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 215. [2021-05-22 02:25:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:41,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-05-22 02:25:41,441 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-05-22 02:25:41,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:41,441 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-05-22 02:25:41,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:41,441 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-05-22 02:25:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:41,441 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:41,442 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:41,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2230,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:41,642 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:41,642 INFO L82 PathProgramCache]: Analyzing trace with hash -436459038, now seen corresponding path program 283 times [2021-05-22 02:25:41,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:41,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789834270] [2021-05-22 02:25:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:41,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:41,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:41,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789834270] [2021-05-22 02:25:41,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789834270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:41,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265121286] [2021-05-22 02:25:41,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:41,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:41,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:41,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265121286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:41,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:41,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:41,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965820422] [2021-05-22 02:25:41,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:41,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:41,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:41,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:41,972 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:42,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:42,195 INFO L93 Difference]: Finished difference Result 260 states and 562 transitions. [2021-05-22 02:25:42,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:25:42,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:42,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:42,196 INFO L225 Difference]: With dead ends: 260 [2021-05-22 02:25:42,196 INFO L226 Difference]: Without dead ends: 260 [2021-05-22 02:25:42,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:25:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-22 02:25:42,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 215. [2021-05-22 02:25:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-05-22 02:25:42,198 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-05-22 02:25:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:42,198 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-05-22 02:25:42,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-05-22 02:25:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:42,198 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:42,198 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:42,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2237,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:42,399 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:42,399 INFO L82 PathProgramCache]: Analyzing trace with hash 451241475, now seen corresponding path program 284 times [2021-05-22 02:25:42,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:42,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151258211] [2021-05-22 02:25:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:42,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:42,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151258211] [2021-05-22 02:25:42,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151258211] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:42,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659909435] [2021-05-22 02:25:42,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:42,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:42,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:42,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:42,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:42,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659909435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:42,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:42,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:42,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146601285] [2021-05-22 02:25:42,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:42,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:42,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:42,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:42,716 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:42,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:42,918 INFO L93 Difference]: Finished difference Result 238 states and 527 transitions. [2021-05-22 02:25:42,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:25:42,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:42,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:42,918 INFO L225 Difference]: With dead ends: 238 [2021-05-22 02:25:42,918 INFO L226 Difference]: Without dead ends: 238 [2021-05-22 02:25:42,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 296.1ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:25:42,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-22 02:25:42,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 216. [2021-05-22 02:25:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.255813953488372) internal successors, (485), 215 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 485 transitions. [2021-05-22 02:25:42,923 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 485 transitions. Word has length 19 [2021-05-22 02:25:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:42,924 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 485 transitions. [2021-05-22 02:25:42,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:42,924 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 485 transitions. [2021-05-22 02:25:42,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:42,924 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:42,924 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:43,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2245 [2021-05-22 02:25:43,137 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:43,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:43,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1247977227, now seen corresponding path program 285 times [2021-05-22 02:25:43,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:43,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8264945] [2021-05-22 02:25:43,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:43,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:43,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8264945] [2021-05-22 02:25:43,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8264945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:43,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791271208] [2021-05-22 02:25:43,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:43,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:25:43,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:43,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:43,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:43,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791271208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:43,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:43,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:43,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010303999] [2021-05-22 02:25:43,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:43,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:43,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:43,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:43,428 INFO L87 Difference]: Start difference. First operand 216 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:43,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:43,853 INFO L93 Difference]: Finished difference Result 276 states and 591 transitions. [2021-05-22 02:25:43,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:25:43,853 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:43,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:43,853 INFO L225 Difference]: With dead ends: 276 [2021-05-22 02:25:43,853 INFO L226 Difference]: Without dead ends: 276 [2021-05-22 02:25:43,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 504.6ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:25:43,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-22 02:25:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 217. [2021-05-22 02:25:43,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.259259259259259) internal successors, (488), 216 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:43,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 488 transitions. [2021-05-22 02:25:43,855 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 488 transitions. Word has length 19 [2021-05-22 02:25:43,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:43,855 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 488 transitions. [2021-05-22 02:25:43,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 488 transitions. [2021-05-22 02:25:43,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:43,856 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:43,856 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:44,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2250,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:44,056 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:44,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:44,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1724288673, now seen corresponding path program 286 times [2021-05-22 02:25:44,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:44,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209627982] [2021-05-22 02:25:44,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:44,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:44,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209627982] [2021-05-22 02:25:44,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209627982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:44,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735208834] [2021-05-22 02:25:44,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:44,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:44,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:44,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:44,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:44,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735208834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:44,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:44,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:44,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379330377] [2021-05-22 02:25:44,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:44,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:44,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:44,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:44,392 INFO L87 Difference]: Start difference. First operand 217 states and 488 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:44,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:44,721 INFO L93 Difference]: Finished difference Result 243 states and 534 transitions. [2021-05-22 02:25:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:25:44,721 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:44,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:44,721 INFO L225 Difference]: With dead ends: 243 [2021-05-22 02:25:44,721 INFO L226 Difference]: Without dead ends: 240 [2021-05-22 02:25:44,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 457.9ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:25:44,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-22 02:25:44,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 217. [2021-05-22 02:25:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2546296296296298) internal successors, (487), 216 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 487 transitions. [2021-05-22 02:25:44,723 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 487 transitions. Word has length 19 [2021-05-22 02:25:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:44,723 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 487 transitions. [2021-05-22 02:25:44,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:44,723 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 487 transitions. [2021-05-22 02:25:44,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:44,724 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:44,724 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:44,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2257,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:44,924 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:44,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:44,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1919593976, now seen corresponding path program 287 times [2021-05-22 02:25:44,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:44,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230416906] [2021-05-22 02:25:44,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:44,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:45,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:45,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230416906] [2021-05-22 02:25:45,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230416906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:45,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798357718] [2021-05-22 02:25:45,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:45,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:25:45,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:45,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:45,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:45,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798357718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:45,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:45,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:45,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884051587] [2021-05-22 02:25:45,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:45,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:45,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:45,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:45,310 INFO L87 Difference]: Start difference. First operand 217 states and 487 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:45,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:45,578 INFO L93 Difference]: Finished difference Result 247 states and 545 transitions. [2021-05-22 02:25:45,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:25:45,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:45,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:45,579 INFO L225 Difference]: With dead ends: 247 [2021-05-22 02:25:45,579 INFO L226 Difference]: Without dead ends: 247 [2021-05-22 02:25:45,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 459.0ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:25:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-22 02:25:45,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 215. [2021-05-22 02:25:45,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-05-22 02:25:45,581 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-05-22 02:25:45,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:45,581 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-05-22 02:25:45,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:45,581 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-05-22 02:25:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:45,581 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:45,581 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:45,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2265 [2021-05-22 02:25:45,782 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:45,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1754323493, now seen corresponding path program 288 times [2021-05-22 02:25:45,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:45,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043253631] [2021-05-22 02:25:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:45,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:45,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043253631] [2021-05-22 02:25:45,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043253631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:45,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267285528] [2021-05-22 02:25:45,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:45,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:25:45,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:45,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:45,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:46,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267285528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:46,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:46,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:46,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082674222] [2021-05-22 02:25:46,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:46,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:46,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:46,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:46,193 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:46,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:46,468 INFO L93 Difference]: Finished difference Result 255 states and 554 transitions. [2021-05-22 02:25:46,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:25:46,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:46,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:46,470 INFO L225 Difference]: With dead ends: 255 [2021-05-22 02:25:46,470 INFO L226 Difference]: Without dead ends: 255 [2021-05-22 02:25:46,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:25:46,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-22 02:25:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 217. [2021-05-22 02:25:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.259259259259259) internal successors, (488), 216 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 488 transitions. [2021-05-22 02:25:46,472 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 488 transitions. Word has length 19 [2021-05-22 02:25:46,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:46,472 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 488 transitions. [2021-05-22 02:25:46,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:46,472 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 488 transitions. [2021-05-22 02:25:46,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:46,472 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:46,472 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:46,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2273,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:46,673 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:46,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:46,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2041873728, now seen corresponding path program 289 times [2021-05-22 02:25:46,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:46,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935922449] [2021-05-22 02:25:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:46,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:46,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935922449] [2021-05-22 02:25:46,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935922449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:46,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995294086] [2021-05-22 02:25:46,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:46,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:46,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:47,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995294086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:47,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:47,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:47,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598830241] [2021-05-22 02:25:47,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:47,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:47,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:47,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:47,054 INFO L87 Difference]: Start difference. First operand 217 states and 488 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:47,557 INFO L93 Difference]: Finished difference Result 317 states and 668 transitions. [2021-05-22 02:25:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:25:47,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:47,558 INFO L225 Difference]: With dead ends: 317 [2021-05-22 02:25:47,558 INFO L226 Difference]: Without dead ends: 317 [2021-05-22 02:25:47,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:25:47,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-22 02:25:47,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 218. [2021-05-22 02:25:47,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.271889400921659) internal successors, (493), 217 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 493 transitions. [2021-05-22 02:25:47,560 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 493 transitions. Word has length 19 [2021-05-22 02:25:47,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:47,561 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 493 transitions. [2021-05-22 02:25:47,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:47,561 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 493 transitions. [2021-05-22 02:25:47,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:47,561 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:47,561 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:47,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2281 [2021-05-22 02:25:47,773 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:47,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:47,773 INFO L82 PathProgramCache]: Analyzing trace with hash 81838403, now seen corresponding path program 290 times [2021-05-22 02:25:47,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:47,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823561268] [2021-05-22 02:25:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:47,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:47,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823561268] [2021-05-22 02:25:47,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823561268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:47,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959789082] [2021-05-22 02:25:47,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:47,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:47,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:47,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:48,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959789082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:48,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:48,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:48,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629124634] [2021-05-22 02:25:48,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:48,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:48,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:48,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:48,140 INFO L87 Difference]: Start difference. First operand 218 states and 493 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:48,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:48,323 INFO L93 Difference]: Finished difference Result 242 states and 534 transitions. [2021-05-22 02:25:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:25:48,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:48,323 INFO L225 Difference]: With dead ends: 242 [2021-05-22 02:25:48,323 INFO L226 Difference]: Without dead ends: 236 [2021-05-22 02:25:48,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 360.0ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:25:48,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-22 02:25:48,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 218. [2021-05-22 02:25:48,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2672811059907834) internal successors, (492), 217 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:48,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 492 transitions. [2021-05-22 02:25:48,325 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 492 transitions. Word has length 19 [2021-05-22 02:25:48,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:48,325 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 492 transitions. [2021-05-22 02:25:48,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:48,326 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 492 transitions. [2021-05-22 02:25:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:48,326 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:48,326 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:48,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2288 [2021-05-22 02:25:48,526 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:48,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:48,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1951103288, now seen corresponding path program 291 times [2021-05-22 02:25:48,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:48,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685456729] [2021-05-22 02:25:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:48,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:48,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685456729] [2021-05-22 02:25:48,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685456729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:48,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524211473] [2021-05-22 02:25:48,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:48,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:25:48,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:48,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-22 02:25:48,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:48,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524211473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:48,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:48,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:48,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319579932] [2021-05-22 02:25:48,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:48,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:48,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:48,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:48,843 INFO L87 Difference]: Start difference. First operand 218 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:49,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:49,144 INFO L93 Difference]: Finished difference Result 265 states and 581 transitions. [2021-05-22 02:25:49,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:25:49,144 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:49,145 INFO L225 Difference]: With dead ends: 265 [2021-05-22 02:25:49,145 INFO L226 Difference]: Without dead ends: 265 [2021-05-22 02:25:49,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 364.9ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:25:49,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-22 02:25:49,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 214. [2021-05-22 02:25:49,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-05-22 02:25:49,147 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-05-22 02:25:49,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:49,147 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-05-22 02:25:49,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:49,147 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-05-22 02:25:49,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:49,147 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:49,147 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:49,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2296,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:49,348 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:49,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:49,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1718698653, now seen corresponding path program 292 times [2021-05-22 02:25:49,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:49,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290912665] [2021-05-22 02:25:49,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:49,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:49,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290912665] [2021-05-22 02:25:49,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290912665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:49,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72065367] [2021-05-22 02:25:49,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:49,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:49,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:49,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:49,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:49,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72065367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:49,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:49,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:49,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311632388] [2021-05-22 02:25:49,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:49,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:49,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:49,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:49,677 INFO L87 Difference]: Start difference. First operand 214 states and 481 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:49,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:49,820 INFO L93 Difference]: Finished difference Result 237 states and 525 transitions. [2021-05-22 02:25:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:25:49,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:49,821 INFO L225 Difference]: With dead ends: 237 [2021-05-22 02:25:49,821 INFO L226 Difference]: Without dead ends: 237 [2021-05-22 02:25:49,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:25:49,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-22 02:25:49,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 215. [2021-05-22 02:25:49,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:49,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-05-22 02:25:49,823 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-05-22 02:25:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:49,823 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-05-22 02:25:49,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-05-22 02:25:49,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:49,823 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:49,823 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:50,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2301,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:50,024 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:50,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:50,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1779532891, now seen corresponding path program 293 times [2021-05-22 02:25:50,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:50,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150470429] [2021-05-22 02:25:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:50,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:50,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150470429] [2021-05-22 02:25:50,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150470429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:50,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136591260] [2021-05-22 02:25:50,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:50,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:25:50,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:50,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:25:50,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:50,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136591260] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:50,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:50,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:50,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906322358] [2021-05-22 02:25:50,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:50,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:50,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:50,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:50,397 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:50,632 INFO L93 Difference]: Finished difference Result 255 states and 558 transitions. [2021-05-22 02:25:50,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:25:50,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:50,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:50,633 INFO L225 Difference]: With dead ends: 255 [2021-05-22 02:25:50,633 INFO L226 Difference]: Without dead ends: 252 [2021-05-22 02:25:50,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 350.9ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:25:50,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-22 02:25:50,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 216. [2021-05-22 02:25:50,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.26046511627907) internal successors, (486), 215 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 486 transitions. [2021-05-22 02:25:50,635 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 486 transitions. Word has length 19 [2021-05-22 02:25:50,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:50,635 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 486 transitions. [2021-05-22 02:25:50,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:50,635 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 486 transitions. [2021-05-22 02:25:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:50,635 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:50,635 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:50,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2306 [2021-05-22 02:25:50,848 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:50,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:50,848 INFO L82 PathProgramCache]: Analyzing trace with hash -652136798, now seen corresponding path program 294 times [2021-05-22 02:25:50,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:50,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495127501] [2021-05-22 02:25:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:50,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:50,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495127501] [2021-05-22 02:25:50,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495127501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:50,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081262701] [2021-05-22 02:25:50,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:50,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:25:50,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:50,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:50,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:51,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081262701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:51,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:51,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:51,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666745188] [2021-05-22 02:25:51,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:51,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:51,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:51,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:51,203 INFO L87 Difference]: Start difference. First operand 216 states and 486 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:51,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:51,818 INFO L93 Difference]: Finished difference Result 359 states and 741 transitions. [2021-05-22 02:25:51,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:25:51,819 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:51,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:51,819 INFO L225 Difference]: With dead ends: 359 [2021-05-22 02:25:51,819 INFO L226 Difference]: Without dead ends: 359 [2021-05-22 02:25:51,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 681.5ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:25:51,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-22 02:25:51,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 221. [2021-05-22 02:25:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2772727272727273) internal successors, (501), 220 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 501 transitions. [2021-05-22 02:25:51,821 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 501 transitions. Word has length 19 [2021-05-22 02:25:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:51,822 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 501 transitions. [2021-05-22 02:25:51,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 501 transitions. [2021-05-22 02:25:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:51,822 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:51,822 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:52,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2314,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:52,022 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:52,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:52,023 INFO L82 PathProgramCache]: Analyzing trace with hash -145790532, now seen corresponding path program 295 times [2021-05-22 02:25:52,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:52,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215529869] [2021-05-22 02:25:52,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:52,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:52,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215529869] [2021-05-22 02:25:52,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215529869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:52,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804280984] [2021-05-22 02:25:52,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:52,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:52,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:52,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804280984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:52,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:52,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:52,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496455384] [2021-05-22 02:25:52,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:52,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:52,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:52,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:52,315 INFO L87 Difference]: Start difference. First operand 221 states and 501 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:52,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:52,784 INFO L93 Difference]: Finished difference Result 310 states and 655 transitions. [2021-05-22 02:25:52,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:25:52,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:52,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:52,785 INFO L225 Difference]: With dead ends: 310 [2021-05-22 02:25:52,785 INFO L226 Difference]: Without dead ends: 310 [2021-05-22 02:25:52,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 499.3ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:25:52,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-05-22 02:25:52,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 220. [2021-05-22 02:25:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.269406392694064) internal successors, (497), 219 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:52,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 497 transitions. [2021-05-22 02:25:52,787 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 497 transitions. Word has length 19 [2021-05-22 02:25:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:52,788 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 497 transitions. [2021-05-22 02:25:52,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:52,788 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 497 transitions. [2021-05-22 02:25:52,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:52,788 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:52,788 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:52,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2322 [2021-05-22 02:25:52,988 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:52,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:52,989 INFO L82 PathProgramCache]: Analyzing trace with hash -683646110, now seen corresponding path program 296 times [2021-05-22 02:25:52,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:52,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882085868] [2021-05-22 02:25:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:53,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:53,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882085868] [2021-05-22 02:25:53,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882085868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:53,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852041490] [2021-05-22 02:25:53,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:53,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:53,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:53,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:53,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:53,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852041490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:53,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:53,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:53,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131883783] [2021-05-22 02:25:53,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:53,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:53,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:53,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:53,297 INFO L87 Difference]: Start difference. First operand 220 states and 497 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:53,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:53,576 INFO L93 Difference]: Finished difference Result 263 states and 578 transitions. [2021-05-22 02:25:53,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:25:53,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:53,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:53,576 INFO L225 Difference]: With dead ends: 263 [2021-05-22 02:25:53,576 INFO L226 Difference]: Without dead ends: 263 [2021-05-22 02:25:53,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 359.6ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:25:53,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-05-22 02:25:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 218. [2021-05-22 02:25:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:53,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-05-22 02:25:53,579 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-05-22 02:25:53,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:53,579 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-05-22 02:25:53,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-05-22 02:25:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:53,579 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:53,579 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:53,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2329 [2021-05-22 02:25:53,779 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:53,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1538645733, now seen corresponding path program 297 times [2021-05-22 02:25:53,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:53,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736675326] [2021-05-22 02:25:53,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:53,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:53,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736675326] [2021-05-22 02:25:53,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736675326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:53,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287664358] [2021-05-22 02:25:53,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:53,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:25:53,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:53,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:53,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:54,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287664358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:54,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:54,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:54,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367907510] [2021-05-22 02:25:54,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:54,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:54,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:54,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:54,162 INFO L87 Difference]: Start difference. First operand 218 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:54,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:54,429 INFO L93 Difference]: Finished difference Result 258 states and 561 transitions. [2021-05-22 02:25:54,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:25:54,429 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:54,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:54,430 INFO L225 Difference]: With dead ends: 258 [2021-05-22 02:25:54,430 INFO L226 Difference]: Without dead ends: 258 [2021-05-22 02:25:54,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 447.3ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:25:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-22 02:25:54,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 221. [2021-05-22 02:25:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2636363636363637) internal successors, (498), 220 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:54,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 498 transitions. [2021-05-22 02:25:54,432 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 498 transitions. Word has length 19 [2021-05-22 02:25:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:54,432 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 498 transitions. [2021-05-22 02:25:54,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 498 transitions. [2021-05-22 02:25:54,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:54,432 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:54,432 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:54,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2334 [2021-05-22 02:25:54,632 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:54,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:54,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1826195968, now seen corresponding path program 298 times [2021-05-22 02:25:54,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:54,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301254085] [2021-05-22 02:25:54,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:54,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:54,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301254085] [2021-05-22 02:25:54,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301254085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:54,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139328711] [2021-05-22 02:25:54,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:54,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:54,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:54,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:54,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:54,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139328711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:54,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:54,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:54,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686262503] [2021-05-22 02:25:54,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:54,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:54,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:54,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:54,931 INFO L87 Difference]: Start difference. First operand 221 states and 498 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:55,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:55,410 INFO L93 Difference]: Finished difference Result 298 states and 631 transitions. [2021-05-22 02:25:55,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:25:55,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:55,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:55,410 INFO L225 Difference]: With dead ends: 298 [2021-05-22 02:25:55,410 INFO L226 Difference]: Without dead ends: 298 [2021-05-22 02:25:55,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 532.7ms TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:25:55,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-22 02:25:55,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 223. [2021-05-22 02:25:55,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.279279279279279) internal successors, (506), 222 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 506 transitions. [2021-05-22 02:25:55,413 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 506 transitions. Word has length 19 [2021-05-22 02:25:55,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:55,413 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 506 transitions. [2021-05-22 02:25:55,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:55,413 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 506 transitions. [2021-05-22 02:25:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:55,413 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:55,413 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:55,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2342 [2021-05-22 02:25:55,614 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:55,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:55,614 INFO L82 PathProgramCache]: Analyzing trace with hash -133839357, now seen corresponding path program 299 times [2021-05-22 02:25:55,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:55,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116511147] [2021-05-22 02:25:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:55,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:55,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116511147] [2021-05-22 02:25:55,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116511147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:55,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729441545] [2021-05-22 02:25:55,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:55,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:25:55,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:55,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:55,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:55,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:55,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729441545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:55,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:55,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:55,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942632715] [2021-05-22 02:25:55,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:55,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:55,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:55,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:55,973 INFO L87 Difference]: Start difference. First operand 223 states and 506 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:56,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:56,216 INFO L93 Difference]: Finished difference Result 249 states and 550 transitions. [2021-05-22 02:25:56,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:25:56,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:56,217 INFO L225 Difference]: With dead ends: 249 [2021-05-22 02:25:56,217 INFO L226 Difference]: Without dead ends: 240 [2021-05-22 02:25:56,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 414.7ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:25:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-22 02:25:56,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 223. [2021-05-22 02:25:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.27027027027027) internal successors, (504), 222 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 504 transitions. [2021-05-22 02:25:56,219 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 504 transitions. Word has length 19 [2021-05-22 02:25:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:56,219 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 504 transitions. [2021-05-22 02:25:56,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 504 transitions. [2021-05-22 02:25:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:56,220 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:56,220 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:56,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2349 [2021-05-22 02:25:56,420 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:56,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:56,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2128186248, now seen corresponding path program 300 times [2021-05-22 02:25:56,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:56,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953725405] [2021-05-22 02:25:56,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:56,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:56,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953725405] [2021-05-22 02:25:56,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953725405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:56,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209845263] [2021-05-22 02:25:56,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:56,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:25:56,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:56,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:56,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:56,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:56,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209845263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:56,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:56,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:56,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755903011] [2021-05-22 02:25:56,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:56,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:56,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:56,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:56,718 INFO L87 Difference]: Start difference. First operand 223 states and 504 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:57,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:57,035 INFO L93 Difference]: Finished difference Result 255 states and 564 transitions. [2021-05-22 02:25:57,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:25:57,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:57,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:57,035 INFO L225 Difference]: With dead ends: 255 [2021-05-22 02:25:57,035 INFO L226 Difference]: Without dead ends: 255 [2021-05-22 02:25:57,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 418.9ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:25:57,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-22 02:25:57,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 222. [2021-05-22 02:25:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.271493212669683) internal successors, (502), 221 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 502 transitions. [2021-05-22 02:25:57,037 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 502 transitions. Word has length 19 [2021-05-22 02:25:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:57,038 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 502 transitions. [2021-05-22 02:25:57,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:57,038 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 502 transitions. [2021-05-22 02:25:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:57,038 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:57,038 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:57,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2357,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:57,238 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:57,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1660434782, now seen corresponding path program 301 times [2021-05-22 02:25:57,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:57,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813762835] [2021-05-22 02:25:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:57,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:57,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813762835] [2021-05-22 02:25:57,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813762835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:57,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952928285] [2021-05-22 02:25:57,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:57,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:57,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:57,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952928285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:57,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:57,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:25:57,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125033864] [2021-05-22 02:25:57,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:25:57,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:57,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:25:57,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:57,527 INFO L87 Difference]: Start difference. First operand 222 states and 502 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:57,636 INFO L93 Difference]: Finished difference Result 249 states and 550 transitions. [2021-05-22 02:25:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:25:57,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:57,636 INFO L225 Difference]: With dead ends: 249 [2021-05-22 02:25:57,637 INFO L226 Difference]: Without dead ends: 249 [2021-05-22 02:25:57,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:25:57,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-22 02:25:57,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 219. [2021-05-22 02:25:57,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:57,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-05-22 02:25:57,638 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-05-22 02:25:57,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:57,639 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-05-22 02:25:57,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:57,639 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-05-22 02:25:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:57,639 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:57,639 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:57,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2362,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:57,839 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:57,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:57,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1443064199, now seen corresponding path program 302 times [2021-05-22 02:25:57,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:57,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776195830] [2021-05-22 02:25:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:57,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:57,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776195830] [2021-05-22 02:25:57,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776195830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:57,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730359337] [2021-05-22 02:25:57,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:57,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:25:57,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:57,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:25:57,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:58,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730359337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:58,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:58,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:58,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963808531] [2021-05-22 02:25:58,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:58,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:58,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:58,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:58,171 INFO L87 Difference]: Start difference. First operand 219 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:58,481 INFO L93 Difference]: Finished difference Result 238 states and 530 transitions. [2021-05-22 02:25:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:25:58,481 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:58,482 INFO L225 Difference]: With dead ends: 238 [2021-05-22 02:25:58,482 INFO L226 Difference]: Without dead ends: 238 [2021-05-22 02:25:58,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 424.1ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:25:58,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-22 02:25:58,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 219. [2021-05-22 02:25:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-05-22 02:25:58,484 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-05-22 02:25:58,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:58,484 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-05-22 02:25:58,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:58,484 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-05-22 02:25:58,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:58,484 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:58,484 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:58,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2367,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:58,685 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:58,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:58,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1693024113, now seen corresponding path program 303 times [2021-05-22 02:25:58,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:58,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888008115] [2021-05-22 02:25:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:58,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:58,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888008115] [2021-05-22 02:25:58,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888008115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:58,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484401568] [2021-05-22 02:25:58,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:58,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:25:58,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:58,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:58,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:58,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484401568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:58,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:58,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:58,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498389900] [2021-05-22 02:25:58,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:58,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:58,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:58,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:58,979 INFO L87 Difference]: Start difference. First operand 219 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:59,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:25:59,411 INFO L93 Difference]: Finished difference Result 250 states and 554 transitions. [2021-05-22 02:25:59,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:25:59,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:25:59,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:25:59,411 INFO L225 Difference]: With dead ends: 250 [2021-05-22 02:25:59,411 INFO L226 Difference]: Without dead ends: 250 [2021-05-22 02:25:59,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 510.0ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:25:59,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-22 02:25:59,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 219. [2021-05-22 02:25:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-05-22 02:25:59,413 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-05-22 02:25:59,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:25:59,413 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-05-22 02:25:59,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:25:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-05-22 02:25:59,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:25:59,414 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:25:59,414 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:25:59,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2371,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:59,614 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:25:59,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:25:59,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1530947719, now seen corresponding path program 304 times [2021-05-22 02:25:59,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:25:59,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051150223] [2021-05-22 02:25:59,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:25:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:25:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:59,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:25:59,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051150223] [2021-05-22 02:25:59,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051150223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:59,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243986128] [2021-05-22 02:25:59,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:25:59,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:25:59,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:25:59,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:25:59,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:25:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:25:59,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243986128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:25:59,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:25:59,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:25:59,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087267037] [2021-05-22 02:25:59,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:25:59,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:25:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:25:59,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:25:59,915 INFO L87 Difference]: Start difference. First operand 219 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:00,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:00,438 INFO L93 Difference]: Finished difference Result 255 states and 563 transitions. [2021-05-22 02:26:00,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:26:00,439 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:00,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:00,439 INFO L225 Difference]: With dead ends: 255 [2021-05-22 02:26:00,439 INFO L226 Difference]: Without dead ends: 255 [2021-05-22 02:26:00,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 561.2ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:26:00,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-22 02:26:00,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 219. [2021-05-22 02:26:00,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.256880733944954) internal successors, (492), 218 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:00,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 492 transitions. [2021-05-22 02:26:00,441 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 492 transitions. Word has length 19 [2021-05-22 02:26:00,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:00,441 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 492 transitions. [2021-05-22 02:26:00,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:00,441 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 492 transitions. [2021-05-22 02:26:00,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:00,442 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:00,442 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:00,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2376 [2021-05-22 02:26:00,642 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:00,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:00,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1967283825, now seen corresponding path program 305 times [2021-05-22 02:26:00,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:00,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407311830] [2021-05-22 02:26:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:00,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:00,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407311830] [2021-05-22 02:26:00,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407311830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:00,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161036781] [2021-05-22 02:26:00,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:00,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:26:00,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:00,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:00,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:00,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161036781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:00,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:00,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:26:00,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682624831] [2021-05-22 02:26:00,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:00,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:00,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:00,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:00,949 INFO L87 Difference]: Start difference. First operand 219 states and 492 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:01,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:01,715 INFO L93 Difference]: Finished difference Result 289 states and 617 transitions. [2021-05-22 02:26:01,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:26:01,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:01,715 INFO L225 Difference]: With dead ends: 289 [2021-05-22 02:26:01,715 INFO L226 Difference]: Without dead ends: 289 [2021-05-22 02:26:01,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 828.6ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:26:01,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-05-22 02:26:01,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 220. [2021-05-22 02:26:01,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2648401826484017) internal successors, (496), 219 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:01,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 496 transitions. [2021-05-22 02:26:01,718 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 496 transitions. Word has length 19 [2021-05-22 02:26:01,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:01,718 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 496 transitions. [2021-05-22 02:26:01,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:01,718 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 496 transitions. [2021-05-22 02:26:01,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:01,718 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:01,718 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:01,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2381,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:01,933 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:01,934 INFO L82 PathProgramCache]: Analyzing trace with hash -839887732, now seen corresponding path program 306 times [2021-05-22 02:26:01,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:01,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298051563] [2021-05-22 02:26:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:02,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:02,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298051563] [2021-05-22 02:26:02,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298051563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:02,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554161196] [2021-05-22 02:26:02,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:02,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:26:02,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:02,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:02,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:02,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554161196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:02,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:02,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:26:02,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226066] [2021-05-22 02:26:02,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:02,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:02,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:02,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:02,285 INFO L87 Difference]: Start difference. First operand 220 states and 496 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:02,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:02,587 INFO L93 Difference]: Finished difference Result 246 states and 545 transitions. [2021-05-22 02:26:02,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:26:02,588 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:02,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:02,588 INFO L225 Difference]: With dead ends: 246 [2021-05-22 02:26:02,588 INFO L226 Difference]: Without dead ends: 244 [2021-05-22 02:26:02,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 415.1ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:26:02,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-22 02:26:02,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 220. [2021-05-22 02:26:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-05-22 02:26:02,590 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-05-22 02:26:02,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:02,590 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-05-22 02:26:02,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:02,590 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-05-22 02:26:02,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:02,591 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:02,591 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:02,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2388 [2021-05-22 02:26:02,791 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:02,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:02,791 INFO L82 PathProgramCache]: Analyzing trace with hash -425566935, now seen corresponding path program 307 times [2021-05-22 02:26:02,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:02,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623249459] [2021-05-22 02:26:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:02,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:02,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623249459] [2021-05-22 02:26:02,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623249459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:02,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854846659] [2021-05-22 02:26:02,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:02,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:02,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:03,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:03,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854846659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:03,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:03,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:03,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667580391] [2021-05-22 02:26:03,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:03,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:03,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:03,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:03,083 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:03,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:03,304 INFO L93 Difference]: Finished difference Result 242 states and 539 transitions. [2021-05-22 02:26:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:26:03,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:03,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:03,305 INFO L225 Difference]: With dead ends: 242 [2021-05-22 02:26:03,305 INFO L226 Difference]: Without dead ends: 242 [2021-05-22 02:26:03,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:03,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-22 02:26:03,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 220. [2021-05-22 02:26:03,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:03,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-05-22 02:26:03,307 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-05-22 02:26:03,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:03,307 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-05-22 02:26:03,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:03,307 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-05-22 02:26:03,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:03,307 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:03,307 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:03,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:03,508 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:03,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:03,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1496562399, now seen corresponding path program 308 times [2021-05-22 02:26:03,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:03,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740253883] [2021-05-22 02:26:03,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:03,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:03,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740253883] [2021-05-22 02:26:03,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740253883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:03,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877941936] [2021-05-22 02:26:03,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:03,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:26:03,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:03,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:03,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:03,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877941936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:03,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:03,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:03,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654592547] [2021-05-22 02:26:03,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:03,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:03,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:03,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:03,794 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:04,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:04,211 INFO L93 Difference]: Finished difference Result 256 states and 566 transitions. [2021-05-22 02:26:04,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:04,212 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:04,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:04,212 INFO L225 Difference]: With dead ends: 256 [2021-05-22 02:26:04,212 INFO L226 Difference]: Without dead ends: 256 [2021-05-22 02:26:04,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 473.4ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:26:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-22 02:26:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 220. [2021-05-22 02:26:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.26027397260274) internal successors, (495), 219 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:04,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 495 transitions. [2021-05-22 02:26:04,214 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 495 transitions. Word has length 19 [2021-05-22 02:26:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:04,214 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 495 transitions. [2021-05-22 02:26:04,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:04,214 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 495 transitions. [2021-05-22 02:26:04,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:04,214 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:04,214 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:04,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2401 [2021-05-22 02:26:04,415 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:04,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:04,415 INFO L82 PathProgramCache]: Analyzing trace with hash 670319846, now seen corresponding path program 309 times [2021-05-22 02:26:04,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:04,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326480669] [2021-05-22 02:26:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:04,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:04,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326480669] [2021-05-22 02:26:04,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326480669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:04,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357247644] [2021-05-22 02:26:04,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:04,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:26:04,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:04,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:04,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:04,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357247644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:04,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:04,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:04,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785652358] [2021-05-22 02:26:04,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:04,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:04,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:04,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:04,745 INFO L87 Difference]: Start difference. First operand 220 states and 495 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:05,058 INFO L93 Difference]: Finished difference Result 272 states and 582 transitions. [2021-05-22 02:26:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:26:05,059 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:05,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:05,059 INFO L225 Difference]: With dead ends: 272 [2021-05-22 02:26:05,059 INFO L226 Difference]: Without dead ends: 264 [2021-05-22 02:26:05,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 437.5ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:26:05,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-22 02:26:05,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 224. [2021-05-22 02:26:05,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2690582959641254) internal successors, (506), 223 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:05,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 506 transitions. [2021-05-22 02:26:05,061 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 506 transitions. Word has length 19 [2021-05-22 02:26:05,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:05,061 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 506 transitions. [2021-05-22 02:26:05,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 506 transitions. [2021-05-22 02:26:05,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:05,062 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:05,062 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:05,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:05,262 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:05,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:05,262 INFO L82 PathProgramCache]: Analyzing trace with hash -699826647, now seen corresponding path program 310 times [2021-05-22 02:26:05,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:05,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376169663] [2021-05-22 02:26:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:05,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:05,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376169663] [2021-05-22 02:26:05,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376169663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:05,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438048782] [2021-05-22 02:26:05,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:05,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:26:05,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:05,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:05,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:05,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438048782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:05,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:05,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:05,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057674681] [2021-05-22 02:26:05,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:05,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:05,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:05,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:05,546 INFO L87 Difference]: Start difference. First operand 224 states and 506 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:05,999 INFO L93 Difference]: Finished difference Result 265 states and 584 transitions. [2021-05-22 02:26:05,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:26:05,999 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:05,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:06,000 INFO L225 Difference]: With dead ends: 265 [2021-05-22 02:26:06,000 INFO L226 Difference]: Without dead ends: 262 [2021-05-22 02:26:06,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 522.7ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:26:06,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-22 02:26:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 224. [2021-05-22 02:26:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.2645739910313902) internal successors, (505), 223 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:06,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 505 transitions. [2021-05-22 02:26:06,002 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 505 transitions. Word has length 19 [2021-05-22 02:26:06,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:06,002 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 505 transitions. [2021-05-22 02:26:06,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:06,002 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 505 transitions. [2021-05-22 02:26:06,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:06,002 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:06,002 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:06,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2413,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:06,207 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:06,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:06,208 INFO L82 PathProgramCache]: Analyzing trace with hash 427569446, now seen corresponding path program 311 times [2021-05-22 02:26:06,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:06,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999432816] [2021-05-22 02:26:06,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:06,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:06,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999432816] [2021-05-22 02:26:06,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999432816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:06,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562251690] [2021-05-22 02:26:06,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:06,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:26:06,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:06,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:26:06,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:06,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562251690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:06,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:06,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:06,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996114735] [2021-05-22 02:26:06,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:06,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:06,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:06,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:06,544 INFO L87 Difference]: Start difference. First operand 224 states and 505 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:06,769 INFO L93 Difference]: Finished difference Result 242 states and 539 transitions. [2021-05-22 02:26:06,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:26:06,769 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:06,770 INFO L225 Difference]: With dead ends: 242 [2021-05-22 02:26:06,770 INFO L226 Difference]: Without dead ends: 242 [2021-05-22 02:26:06,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:26:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-22 02:26:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 218. [2021-05-22 02:26:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-05-22 02:26:06,772 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-05-22 02:26:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:06,772 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-05-22 02:26:06,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-05-22 02:26:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:06,772 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:06,772 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:06,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2420 [2021-05-22 02:26:06,981 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:06,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:06,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1315269959, now seen corresponding path program 312 times [2021-05-22 02:26:06,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:06,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067288587] [2021-05-22 02:26:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:07,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:07,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067288587] [2021-05-22 02:26:07,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067288587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:07,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846606609] [2021-05-22 02:26:07,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:07,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:26:07,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:07,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:07,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:07,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846606609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:07,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:07,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:07,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392195985] [2021-05-22 02:26:07,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:07,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:07,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:07,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:07,297 INFO L87 Difference]: Start difference. First operand 218 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:07,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:07,482 INFO L93 Difference]: Finished difference Result 243 states and 540 transitions. [2021-05-22 02:26:07,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:26:07,482 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:07,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:07,482 INFO L225 Difference]: With dead ends: 243 [2021-05-22 02:26:07,482 INFO L226 Difference]: Without dead ends: 243 [2021-05-22 02:26:07,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 311.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:26:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-22 02:26:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 218. [2021-05-22 02:26:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-05-22 02:26:07,485 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-05-22 02:26:07,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:07,485 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-05-22 02:26:07,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:07,485 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-05-22 02:26:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:07,485 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:07,485 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:07,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2428,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:07,688 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:07,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:07,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2112005711, now seen corresponding path program 313 times [2021-05-22 02:26:07,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:07,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130513517] [2021-05-22 02:26:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:07,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:07,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:07,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130513517] [2021-05-22 02:26:07,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130513517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:07,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766483371] [2021-05-22 02:26:07,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:07,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:07,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:07,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766483371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:07,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:07,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:07,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750189383] [2021-05-22 02:26:07,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:07,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:07,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:07,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:07,980 INFO L87 Difference]: Start difference. First operand 218 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:08,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:08,289 INFO L93 Difference]: Finished difference Result 249 states and 552 transitions. [2021-05-22 02:26:08,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:08,290 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:08,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:08,290 INFO L225 Difference]: With dead ends: 249 [2021-05-22 02:26:08,290 INFO L226 Difference]: Without dead ends: 249 [2021-05-22 02:26:08,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 355.8ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:26:08,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-22 02:26:08,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 218. [2021-05-22 02:26:08,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2580645161290325) internal successors, (490), 217 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:08,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 490 transitions. [2021-05-22 02:26:08,292 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 490 transitions. Word has length 19 [2021-05-22 02:26:08,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:08,292 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 490 transitions. [2021-05-22 02:26:08,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:08,292 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 490 transitions. [2021-05-22 02:26:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:08,292 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:08,293 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:08,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2433 [2021-05-22 02:26:08,493 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:08,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1895411350, now seen corresponding path program 314 times [2021-05-22 02:26:08,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:08,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048650947] [2021-05-22 02:26:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:08,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:08,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048650947] [2021-05-22 02:26:08,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048650947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:08,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776831891] [2021-05-22 02:26:08,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:08,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:26:08,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:08,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:08,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:08,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776831891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:08,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:08,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:08,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130460298] [2021-05-22 02:26:08,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:08,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:08,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:08,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:08,813 INFO L87 Difference]: Start difference. First operand 218 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:09,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:09,002 INFO L93 Difference]: Finished difference Result 238 states and 530 transitions. [2021-05-22 02:26:09,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:26:09,003 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:09,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:09,003 INFO L225 Difference]: With dead ends: 238 [2021-05-22 02:26:09,003 INFO L226 Difference]: Without dead ends: 238 [2021-05-22 02:26:09,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:26:09,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-22 02:26:09,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 215. [2021-05-22 02:26:09,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-05-22 02:26:09,005 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-05-22 02:26:09,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:09,005 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-05-22 02:26:09,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-05-22 02:26:09,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:09,005 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:09,005 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:09,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2440,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:09,206 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:09,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:09,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1676615319, now seen corresponding path program 315 times [2021-05-22 02:26:09,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:09,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171676911] [2021-05-22 02:26:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:09,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:09,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171676911] [2021-05-22 02:26:09,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171676911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:09,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373406390] [2021-05-22 02:26:09,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:09,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:26:09,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:09,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:09,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373406390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:09,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:09,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:09,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112475374] [2021-05-22 02:26:09,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:09,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:09,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:09,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:09,562 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:09,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:09,810 INFO L93 Difference]: Finished difference Result 249 states and 541 transitions. [2021-05-22 02:26:09,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:26:09,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:09,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:09,810 INFO L225 Difference]: With dead ends: 249 [2021-05-22 02:26:09,810 INFO L226 Difference]: Without dead ends: 249 [2021-05-22 02:26:09,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 410.0ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:26:09,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-22 02:26:09,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 226. [2021-05-22 02:26:09,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.2355555555555555) internal successors, (503), 225 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:09,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 503 transitions. [2021-05-22 02:26:09,812 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 503 transitions. Word has length 19 [2021-05-22 02:26:09,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:09,812 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 503 transitions. [2021-05-22 02:26:09,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:09,813 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 503 transitions. [2021-05-22 02:26:09,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:09,813 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:09,813 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:10,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2448,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:10,013 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:10,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1389065084, now seen corresponding path program 316 times [2021-05-22 02:26:10,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:10,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841860699] [2021-05-22 02:26:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:10,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:10,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841860699] [2021-05-22 02:26:10,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841860699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:10,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330752631] [2021-05-22 02:26:10,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:10,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:26:10,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:10,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:10,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:10,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330752631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:10,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:10,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:10,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026167458] [2021-05-22 02:26:10,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:10,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:10,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:10,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:10,315 INFO L87 Difference]: Start difference. First operand 226 states and 503 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:10,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:10,613 INFO L93 Difference]: Finished difference Result 311 states and 659 transitions. [2021-05-22 02:26:10,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:26:10,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:10,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:10,614 INFO L225 Difference]: With dead ends: 311 [2021-05-22 02:26:10,614 INFO L226 Difference]: Without dead ends: 311 [2021-05-22 02:26:10,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 326.7ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:26:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-22 02:26:10,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 227. [2021-05-22 02:26:10,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.247787610619469) internal successors, (508), 226 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 508 transitions. [2021-05-22 02:26:10,616 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 508 transitions. Word has length 19 [2021-05-22 02:26:10,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:10,616 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 508 transitions. [2021-05-22 02:26:10,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:10,616 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 508 transitions. [2021-05-22 02:26:10,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:10,617 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:10,617 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:10,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2456 [2021-05-22 02:26:10,817 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:10,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:10,817 INFO L82 PathProgramCache]: Analyzing trace with hash 945866887, now seen corresponding path program 317 times [2021-05-22 02:26:10,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:10,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121230913] [2021-05-22 02:26:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:10,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:10,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121230913] [2021-05-22 02:26:10,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121230913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:10,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961009696] [2021-05-22 02:26:10,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:10,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:26:10,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:10,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:10,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:11,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961009696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:11,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:11,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:11,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925478375] [2021-05-22 02:26:11,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:11,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:11,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:11,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:11,167 INFO L87 Difference]: Start difference. First operand 227 states and 508 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:11,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:11,352 INFO L93 Difference]: Finished difference Result 236 states and 524 transitions. [2021-05-22 02:26:11,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:26:11,352 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:11,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:11,352 INFO L225 Difference]: With dead ends: 236 [2021-05-22 02:26:11,352 INFO L226 Difference]: Without dead ends: 230 [2021-05-22 02:26:11,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 330.8ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:26:11,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-22 02:26:11,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 218. [2021-05-22 02:26:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2672811059907834) internal successors, (492), 217 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:11,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 492 transitions. [2021-05-22 02:26:11,354 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 492 transitions. Word has length 19 [2021-05-22 02:26:11,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:11,354 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 492 transitions. [2021-05-22 02:26:11,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:11,354 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 492 transitions. [2021-05-22 02:26:11,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:11,354 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:11,354 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:11,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2463 [2021-05-22 02:26:11,555 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:11,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:11,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1087074804, now seen corresponding path program 318 times [2021-05-22 02:26:11,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:11,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818818490] [2021-05-22 02:26:11,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:11,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:11,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818818490] [2021-05-22 02:26:11,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818818490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:11,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441399607] [2021-05-22 02:26:11,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:11,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:26:11,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:11,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:11,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:11,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441399607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:11,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:11,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:11,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287880292] [2021-05-22 02:26:11,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:11,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:11,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:11,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:11,847 INFO L87 Difference]: Start difference. First operand 218 states and 492 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:12,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:12,016 INFO L93 Difference]: Finished difference Result 252 states and 558 transitions. [2021-05-22 02:26:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:26:12,017 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:12,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:12,017 INFO L225 Difference]: With dead ends: 252 [2021-05-22 02:26:12,017 INFO L226 Difference]: Without dead ends: 252 [2021-05-22 02:26:12,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 254.3ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:26:12,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-22 02:26:12,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 213. [2021-05-22 02:26:12,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.259433962264151) internal successors, (479), 212 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:12,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 479 transitions. [2021-05-22 02:26:12,019 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 479 transitions. Word has length 19 [2021-05-22 02:26:12,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:12,019 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 479 transitions. [2021-05-22 02:26:12,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:12,019 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 479 transitions. [2021-05-22 02:26:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:12,019 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:12,019 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:12,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2471 [2021-05-22 02:26:12,220 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:12,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:12,220 INFO L82 PathProgramCache]: Analyzing trace with hash 210899919, now seen corresponding path program 319 times [2021-05-22 02:26:12,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:12,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576175977] [2021-05-22 02:26:12,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:12,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:12,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576175977] [2021-05-22 02:26:12,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576175977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:12,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127368430] [2021-05-22 02:26:12,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:12,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:26:12,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:12,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127368430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:12,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:12,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:12,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951623256] [2021-05-22 02:26:12,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:12,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:12,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:12,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:12,594 INFO L87 Difference]: Start difference. First operand 213 states and 479 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:12,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:12,774 INFO L93 Difference]: Finished difference Result 236 states and 525 transitions. [2021-05-22 02:26:12,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:26:12,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:12,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:12,775 INFO L225 Difference]: With dead ends: 236 [2021-05-22 02:26:12,775 INFO L226 Difference]: Without dead ends: 236 [2021-05-22 02:26:12,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:12,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-22 02:26:12,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 214. [2021-05-22 02:26:12,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-05-22 02:26:12,777 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-05-22 02:26:12,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:12,777 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-05-22 02:26:12,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:12,777 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-05-22 02:26:12,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:12,777 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:12,777 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:12,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2476 [2021-05-22 02:26:12,978 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:12,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:12,978 INFO L82 PathProgramCache]: Analyzing trace with hash -860095545, now seen corresponding path program 320 times [2021-05-22 02:26:12,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:12,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640122847] [2021-05-22 02:26:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:13,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:13,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640122847] [2021-05-22 02:26:13,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640122847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:13,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666643938] [2021-05-22 02:26:13,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:13,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:26:13,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:13,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:13,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:13,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666643938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:13,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:13,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:13,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957142109] [2021-05-22 02:26:13,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:13,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:13,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:13,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:13,266 INFO L87 Difference]: Start difference. First operand 214 states and 481 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:13,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:13,651 INFO L93 Difference]: Finished difference Result 252 states and 557 transitions. [2021-05-22 02:26:13,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:26:13,652 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:13,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:13,652 INFO L225 Difference]: With dead ends: 252 [2021-05-22 02:26:13,652 INFO L226 Difference]: Without dead ends: 252 [2021-05-22 02:26:13,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 426.0ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:26:13,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-22 02:26:13,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 215. [2021-05-22 02:26:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2570093457943927) internal successors, (483), 214 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 483 transitions. [2021-05-22 02:26:13,654 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 483 transitions. Word has length 19 [2021-05-22 02:26:13,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:13,654 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 483 transitions. [2021-05-22 02:26:13,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:13,654 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 483 transitions. [2021-05-22 02:26:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:13,654 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:13,654 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:13,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2480,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:13,855 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:13,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:13,855 INFO L82 PathProgramCache]: Analyzing trace with hash -63359793, now seen corresponding path program 321 times [2021-05-22 02:26:13,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:13,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927558301] [2021-05-22 02:26:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:13,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:13,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:13,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927558301] [2021-05-22 02:26:13,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927558301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:13,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611405362] [2021-05-22 02:26:13,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:13,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:26:13,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:13,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:13,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:14,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611405362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:14,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:14,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:14,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006401005] [2021-05-22 02:26:14,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:14,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:14,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:14,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:14,141 INFO L87 Difference]: Start difference. First operand 215 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:14,626 INFO L93 Difference]: Finished difference Result 263 states and 576 transitions. [2021-05-22 02:26:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:26:14,626 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:14,627 INFO L225 Difference]: With dead ends: 263 [2021-05-22 02:26:14,627 INFO L226 Difference]: Without dead ends: 260 [2021-05-22 02:26:14,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 504.6ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:26:14,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-22 02:26:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 216. [2021-05-22 02:26:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.26046511627907) internal successors, (486), 215 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:14,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 486 transitions. [2021-05-22 02:26:14,629 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 486 transitions. Word has length 19 [2021-05-22 02:26:14,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:14,629 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 486 transitions. [2021-05-22 02:26:14,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:14,629 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 486 transitions. [2021-05-22 02:26:14,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:14,629 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:14,629 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:14,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2485 [2021-05-22 02:26:14,829 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:14,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:14,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1064036300, now seen corresponding path program 322 times [2021-05-22 02:26:14,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:14,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926818492] [2021-05-22 02:26:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:14,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:14,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926818492] [2021-05-22 02:26:14,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926818492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:14,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016412905] [2021-05-22 02:26:14,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:14,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:26:14,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:14,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:14,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:15,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016412905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:15,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:15,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:15,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549101896] [2021-05-22 02:26:15,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:15,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:15,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:15,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:15,156 INFO L87 Difference]: Start difference. First operand 216 states and 486 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:15,538 INFO L93 Difference]: Finished difference Result 265 states and 576 transitions. [2021-05-22 02:26:15,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:26:15,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:15,538 INFO L225 Difference]: With dead ends: 265 [2021-05-22 02:26:15,538 INFO L226 Difference]: Without dead ends: 265 [2021-05-22 02:26:15,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 478.2ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:26:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-22 02:26:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 214. [2021-05-22 02:26:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-05-22 02:26:15,540 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-05-22 02:26:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:15,540 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-05-22 02:26:15,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-05-22 02:26:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:15,541 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:15,541 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:15,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2492,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:15,741 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:15,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:15,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1951736813, now seen corresponding path program 323 times [2021-05-22 02:26:15,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:15,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248220254] [2021-05-22 02:26:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:15,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:15,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248220254] [2021-05-22 02:26:15,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248220254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:15,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639642966] [2021-05-22 02:26:15,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:15,885 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:26:15,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:15,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:15,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:16,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639642966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:16,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:16,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:16,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110463719] [2021-05-22 02:26:16,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:16,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:16,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:16,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:16,048 INFO L87 Difference]: Start difference. First operand 214 states and 481 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:16,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:16,275 INFO L93 Difference]: Finished difference Result 239 states and 531 transitions. [2021-05-22 02:26:16,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:26:16,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:16,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:16,276 INFO L225 Difference]: With dead ends: 239 [2021-05-22 02:26:16,276 INFO L226 Difference]: Without dead ends: 239 [2021-05-22 02:26:16,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 292.5ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:26:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-22 02:26:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 214. [2021-05-22 02:26:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-05-22 02:26:16,278 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-05-22 02:26:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:16,278 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-05-22 02:26:16,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-05-22 02:26:16,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:16,279 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:16,279 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:16,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2500 [2021-05-22 02:26:16,479 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:16,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1546494731, now seen corresponding path program 324 times [2021-05-22 02:26:16,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:16,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718871709] [2021-05-22 02:26:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:16,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:16,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718871709] [2021-05-22 02:26:16,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718871709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:16,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950580803] [2021-05-22 02:26:16,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:16,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:26:16,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:16,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-22 02:26:16,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:16,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950580803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:16,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:16,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:26:16,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362910564] [2021-05-22 02:26:16,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:16,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:16,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:16,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:16,788 INFO L87 Difference]: Start difference. First operand 214 states and 481 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:17,062 INFO L93 Difference]: Finished difference Result 251 states and 555 transitions. [2021-05-22 02:26:17,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:17,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:17,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:17,062 INFO L225 Difference]: With dead ends: 251 [2021-05-22 02:26:17,062 INFO L226 Difference]: Without dead ends: 251 [2021-05-22 02:26:17,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 397.8ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:26:17,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-22 02:26:17,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 214. [2021-05-22 02:26:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2582159624413145) internal successors, (481), 213 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 481 transitions. [2021-05-22 02:26:17,064 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 481 transitions. Word has length 19 [2021-05-22 02:26:17,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:17,064 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 481 transitions. [2021-05-22 02:26:17,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 481 transitions. [2021-05-22 02:26:17,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:17,065 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:17,065 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:17,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2505,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:17,265 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:17,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:17,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1258944496, now seen corresponding path program 325 times [2021-05-22 02:26:17,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:17,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340457540] [2021-05-22 02:26:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:17,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:17,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340457540] [2021-05-22 02:26:17,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340457540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:17,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623655681] [2021-05-22 02:26:17,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:17,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:17,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:17,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623655681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:17,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:17,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:17,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012485490] [2021-05-22 02:26:17,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:17,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:17,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:17,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:17,601 INFO L87 Difference]: Start difference. First operand 214 states and 481 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:17,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:17,810 INFO L93 Difference]: Finished difference Result 234 states and 520 transitions. [2021-05-22 02:26:17,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:26:17,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:17,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:17,811 INFO L225 Difference]: With dead ends: 234 [2021-05-22 02:26:17,811 INFO L226 Difference]: Without dead ends: 234 [2021-05-22 02:26:17,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 383.7ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:26:17,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-22 02:26:17,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 211. [2021-05-22 02:26:17,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-05-22 02:26:17,813 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-05-22 02:26:17,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:17,813 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-05-22 02:26:17,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:17,813 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-05-22 02:26:17,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:17,813 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:17,813 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:18,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2513 [2021-05-22 02:26:18,014 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:18,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:18,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1040148465, now seen corresponding path program 326 times [2021-05-22 02:26:18,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:18,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142164445] [2021-05-22 02:26:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:18,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:18,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142164445] [2021-05-22 02:26:18,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142164445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:18,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305719575] [2021-05-22 02:26:18,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:18,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:26:18,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:18,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:18,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:18,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305719575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:18,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:18,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:18,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043773436] [2021-05-22 02:26:18,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:18,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:18,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:18,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:18,371 INFO L87 Difference]: Start difference. First operand 211 states and 473 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:18,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:18,567 INFO L93 Difference]: Finished difference Result 245 states and 534 transitions. [2021-05-22 02:26:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:18,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:18,567 INFO L225 Difference]: With dead ends: 245 [2021-05-22 02:26:18,568 INFO L226 Difference]: Without dead ends: 245 [2021-05-22 02:26:18,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:26:18,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-22 02:26:18,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 213. [2021-05-22 02:26:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2547169811320753) internal successors, (478), 212 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:18,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 478 transitions. [2021-05-22 02:26:18,569 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 478 transitions. Word has length 19 [2021-05-22 02:26:18,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:18,570 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 478 transitions. [2021-05-22 02:26:18,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:18,570 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 478 transitions. [2021-05-22 02:26:18,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:18,570 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:18,570 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:18,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2521 [2021-05-22 02:26:18,770 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:18,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:18,771 INFO L82 PathProgramCache]: Analyzing trace with hash -752598230, now seen corresponding path program 327 times [2021-05-22 02:26:18,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:18,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635801747] [2021-05-22 02:26:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:18,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:18,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:18,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635801747] [2021-05-22 02:26:18,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635801747] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:18,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566409537] [2021-05-22 02:26:18,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:18,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:26:18,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:18,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:18,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:19,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566409537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:19,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:19,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:19,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420467739] [2021-05-22 02:26:19,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:19,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:19,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:19,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:19,069 INFO L87 Difference]: Start difference. First operand 213 states and 478 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:19,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:19,346 INFO L93 Difference]: Finished difference Result 304 states and 644 transitions. [2021-05-22 02:26:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:26:19,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:19,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:19,347 INFO L225 Difference]: With dead ends: 304 [2021-05-22 02:26:19,347 INFO L226 Difference]: Without dead ends: 304 [2021-05-22 02:26:19,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:26:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-22 02:26:19,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 214. [2021-05-22 02:26:19,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.267605633802817) internal successors, (483), 213 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 483 transitions. [2021-05-22 02:26:19,349 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 483 transitions. Word has length 19 [2021-05-22 02:26:19,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:19,349 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 483 transitions. [2021-05-22 02:26:19,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:19,349 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 483 transitions. [2021-05-22 02:26:19,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:19,350 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:19,350 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:19,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:19,550 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:19,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:19,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1582333741, now seen corresponding path program 328 times [2021-05-22 02:26:19,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:19,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086068541] [2021-05-22 02:26:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:19,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:19,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086068541] [2021-05-22 02:26:19,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086068541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:19,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039127294] [2021-05-22 02:26:19,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:19,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:26:19,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:19,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:19,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:19,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039127294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:19,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:19,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:19,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012943160] [2021-05-22 02:26:19,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:19,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:19,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:19,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:19,905 INFO L87 Difference]: Start difference. First operand 214 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:20,073 INFO L93 Difference]: Finished difference Result 232 states and 514 transitions. [2021-05-22 02:26:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:26:20,074 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:20,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:20,074 INFO L225 Difference]: With dead ends: 232 [2021-05-22 02:26:20,074 INFO L226 Difference]: Without dead ends: 226 [2021-05-22 02:26:20,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:26:20,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-22 02:26:20,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 214. [2021-05-22 02:26:20,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2629107981220655) internal successors, (482), 213 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 482 transitions. [2021-05-22 02:26:20,076 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 482 transitions. Word has length 19 [2021-05-22 02:26:20,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:20,076 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 482 transitions. [2021-05-22 02:26:20,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:20,076 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 482 transitions. [2021-05-22 02:26:20,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:20,076 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:20,076 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:20,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2536 [2021-05-22 02:26:20,277 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:20,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash -450607950, now seen corresponding path program 329 times [2021-05-22 02:26:20,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:20,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568579081] [2021-05-22 02:26:20,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:20,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:20,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568579081] [2021-05-22 02:26:20,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568579081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:20,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000782029] [2021-05-22 02:26:20,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:20,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:26:20,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:20,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:20,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:20,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000782029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:20,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:20,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:20,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018815797] [2021-05-22 02:26:20,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:20,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:20,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:20,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:20,577 INFO L87 Difference]: Start difference. First operand 214 states and 482 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:20,785 INFO L93 Difference]: Finished difference Result 248 states and 548 transitions. [2021-05-22 02:26:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:20,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:20,786 INFO L225 Difference]: With dead ends: 248 [2021-05-22 02:26:20,786 INFO L226 Difference]: Without dead ends: 248 [2021-05-22 02:26:20,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:26:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-22 02:26:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 210. [2021-05-22 02:26:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-05-22 02:26:20,788 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-05-22 02:26:20,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:20,788 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-05-22 02:26:20,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:20,788 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-05-22 02:26:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:20,788 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:20,788 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:21,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2544 [2021-05-22 02:26:21,004 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:21,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:21,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1075773305, now seen corresponding path program 330 times [2021-05-22 02:26:21,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:21,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195438969] [2021-05-22 02:26:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:21,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:21,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195438969] [2021-05-22 02:26:21,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195438969] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:21,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481850156] [2021-05-22 02:26:21,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:21,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:26:21,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:21,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:21,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:21,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481850156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:21,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:21,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:21,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941473241] [2021-05-22 02:26:21,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:21,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:21,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:21,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:21,316 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:21,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:21,472 INFO L93 Difference]: Finished difference Result 242 states and 535 transitions. [2021-05-22 02:26:21,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:21,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:21,473 INFO L225 Difference]: With dead ends: 242 [2021-05-22 02:26:21,473 INFO L226 Difference]: Without dead ends: 242 [2021-05-22 02:26:21,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 283.0ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:26:21,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-22 02:26:21,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 211. [2021-05-22 02:26:21,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:21,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-05-22 02:26:21,475 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-05-22 02:26:21,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:21,475 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-05-22 02:26:21,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:21,475 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-05-22 02:26:21,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:21,476 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:21,476 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:21,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2549 [2021-05-22 02:26:21,676 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:21,676 INFO L82 PathProgramCache]: Analyzing trace with hash -279037553, now seen corresponding path program 331 times [2021-05-22 02:26:21,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:21,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215461828] [2021-05-22 02:26:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:21,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:21,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215461828] [2021-05-22 02:26:21,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215461828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:21,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738200743] [2021-05-22 02:26:21,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:21,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:21,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:21,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738200743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:21,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:21,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:21,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428374257] [2021-05-22 02:26:21,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:21,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:21,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:21,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:21,979 INFO L87 Difference]: Start difference. First operand 211 states and 473 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:22,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:22,237 INFO L93 Difference]: Finished difference Result 258 states and 564 transitions. [2021-05-22 02:26:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:26:22,238 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:22,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:22,238 INFO L225 Difference]: With dead ends: 258 [2021-05-22 02:26:22,238 INFO L226 Difference]: Without dead ends: 255 [2021-05-22 02:26:22,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:26:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-22 02:26:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 212. [2021-05-22 02:26:22,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.255924170616114) internal successors, (476), 211 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 476 transitions. [2021-05-22 02:26:22,240 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 476 transitions. Word has length 19 [2021-05-22 02:26:22,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:22,240 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 476 transitions. [2021-05-22 02:26:22,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:22,240 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 476 transitions. [2021-05-22 02:26:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:22,241 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:22,241 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:22,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2554 [2021-05-22 02:26:22,456 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:22,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:22,456 INFO L82 PathProgramCache]: Analyzing trace with hash 848358540, now seen corresponding path program 332 times [2021-05-22 02:26:22,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:22,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644761726] [2021-05-22 02:26:22,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:22,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:22,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644761726] [2021-05-22 02:26:22,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644761726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:22,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396186678] [2021-05-22 02:26:22,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:22,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:26:22,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:22,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:22,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:22,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396186678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:22,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:22,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:22,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334913594] [2021-05-22 02:26:22,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:22,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:22,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:22,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:22,794 INFO L87 Difference]: Start difference. First operand 212 states and 476 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:23,395 INFO L93 Difference]: Finished difference Result 349 states and 723 transitions. [2021-05-22 02:26:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:26:23,395 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:23,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:23,395 INFO L225 Difference]: With dead ends: 349 [2021-05-22 02:26:23,395 INFO L226 Difference]: Without dead ends: 349 [2021-05-22 02:26:23,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 718.1ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:26:23,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-22 02:26:23,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 216. [2021-05-22 02:26:23,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.2837209302325583) internal successors, (491), 215 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 491 transitions. [2021-05-22 02:26:23,398 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 491 transitions. Word has length 19 [2021-05-22 02:26:23,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:23,398 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 491 transitions. [2021-05-22 02:26:23,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:23,398 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 491 transitions. [2021-05-22 02:26:23,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:23,398 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:23,398 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:23,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2561,333 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:23,599 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:23,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:23,599 INFO L82 PathProgramCache]: Analyzing trace with hash 227308713, now seen corresponding path program 333 times [2021-05-22 02:26:23,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:23,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74401485] [2021-05-22 02:26:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:23,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:23,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74401485] [2021-05-22 02:26:23,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74401485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:23,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517598783] [2021-05-22 02:26:23,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:23,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:26:23,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:23,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:23,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:23,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517598783] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:23,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:23,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:23,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52928805] [2021-05-22 02:26:23,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:23,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:23,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:23,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:23,978 INFO L87 Difference]: Start difference. First operand 216 states and 491 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:24,328 INFO L93 Difference]: Finished difference Result 239 states and 532 transitions. [2021-05-22 02:26:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:26:24,329 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:24,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:24,329 INFO L225 Difference]: With dead ends: 239 [2021-05-22 02:26:24,329 INFO L226 Difference]: Without dead ends: 233 [2021-05-22 02:26:24,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 490.0ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:26:24,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-22 02:26:24,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 216. [2021-05-22 02:26:24,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.2790697674418605) internal successors, (490), 215 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 490 transitions. [2021-05-22 02:26:24,331 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 490 transitions. Word has length 19 [2021-05-22 02:26:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:24,331 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 490 transitions. [2021-05-22 02:26:24,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 490 transitions. [2021-05-22 02:26:24,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:24,331 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:24,331 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:24,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2569,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:24,537 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:24,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:24,537 INFO L82 PathProgramCache]: Analyzing trace with hash 514858948, now seen corresponding path program 334 times [2021-05-22 02:26:24,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:24,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039062608] [2021-05-22 02:26:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:24,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:24,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039062608] [2021-05-22 02:26:24,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039062608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:24,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884904567] [2021-05-22 02:26:24,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:24,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:26:24,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:24,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:24,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:24,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884904567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:24,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:24,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:24,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972587514] [2021-05-22 02:26:24,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:24,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:24,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:24,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:24,829 INFO L87 Difference]: Start difference. First operand 216 states and 490 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:25,206 INFO L93 Difference]: Finished difference Result 293 states and 629 transitions. [2021-05-22 02:26:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:26:25,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:25,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:25,207 INFO L225 Difference]: With dead ends: 293 [2021-05-22 02:26:25,207 INFO L226 Difference]: Without dead ends: 293 [2021-05-22 02:26:25,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 454.8ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:26:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-22 02:26:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 213. [2021-05-22 02:26:25,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2641509433962264) internal successors, (480), 212 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2021-05-22 02:26:25,209 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 19 [2021-05-22 02:26:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:25,209 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2021-05-22 02:26:25,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2021-05-22 02:26:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:25,209 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:25,209 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:25,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2577 [2021-05-22 02:26:25,410 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:25,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:25,410 INFO L82 PathProgramCache]: Analyzing trace with hash 816849228, now seen corresponding path program 335 times [2021-05-22 02:26:25,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:25,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095221946] [2021-05-22 02:26:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:25,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:25,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095221946] [2021-05-22 02:26:25,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095221946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:25,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194387052] [2021-05-22 02:26:25,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:25,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:26:25,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:25,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:25,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:25,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194387052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:25,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:25,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:25,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908702609] [2021-05-22 02:26:25,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:25,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:25,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:25,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:25,720 INFO L87 Difference]: Start difference. First operand 213 states and 480 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:25,943 INFO L93 Difference]: Finished difference Result 250 states and 552 transitions. [2021-05-22 02:26:25,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:26:25,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:25,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:25,943 INFO L225 Difference]: With dead ends: 250 [2021-05-22 02:26:25,943 INFO L226 Difference]: Without dead ends: 250 [2021-05-22 02:26:25,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:26:25,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-22 02:26:25,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 210. [2021-05-22 02:26:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-05-22 02:26:25,945 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-05-22 02:26:25,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:25,945 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-05-22 02:26:25,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-05-22 02:26:25,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:25,946 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:25,946 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:26,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2584,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:26,146 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:26,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1255826225, now seen corresponding path program 336 times [2021-05-22 02:26:26,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:26,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276129323] [2021-05-22 02:26:26,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:26,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:26,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276129323] [2021-05-22 02:26:26,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276129323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:26,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530486116] [2021-05-22 02:26:26,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:26,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:26:26,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:26,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:26,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:26,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530486116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:26,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:26,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:26,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404979517] [2021-05-22 02:26:26,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:26,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:26,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:26,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:26,510 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:26,879 INFO L93 Difference]: Finished difference Result 251 states and 546 transitions. [2021-05-22 02:26:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:26:26,879 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:26,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:26,880 INFO L225 Difference]: With dead ends: 251 [2021-05-22 02:26:26,880 INFO L226 Difference]: Without dead ends: 251 [2021-05-22 02:26:26,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 475.5ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:26:26,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-22 02:26:26,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 213. [2021-05-22 02:26:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.259433962264151) internal successors, (479), 212 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 479 transitions. [2021-05-22 02:26:26,882 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 479 transitions. Word has length 19 [2021-05-22 02:26:26,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:26,882 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 479 transitions. [2021-05-22 02:26:26,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:26,882 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 479 transitions. [2021-05-22 02:26:26,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:26,882 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:26,882 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:27,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2589 [2021-05-22 02:26:27,083 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:27,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:27,083 INFO L82 PathProgramCache]: Analyzing trace with hash -968275990, now seen corresponding path program 337 times [2021-05-22 02:26:27,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:27,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248416252] [2021-05-22 02:26:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:27,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:27,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248416252] [2021-05-22 02:26:27,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248416252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:27,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434677864] [2021-05-22 02:26:27,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:27,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:27,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:27,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434677864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:27,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:27,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:27,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044864974] [2021-05-22 02:26:27,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:27,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:27,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:27,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:27,366 INFO L87 Difference]: Start difference. First operand 213 states and 479 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:27,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:27,928 INFO L93 Difference]: Finished difference Result 303 states and 647 transitions. [2021-05-22 02:26:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:26:27,928 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:27,929 INFO L225 Difference]: With dead ends: 303 [2021-05-22 02:26:27,929 INFO L226 Difference]: Without dead ends: 303 [2021-05-22 02:26:27,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 547.8ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:26:27,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-05-22 02:26:27,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 215. [2021-05-22 02:26:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2757009345794392) internal successors, (487), 214 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 487 transitions. [2021-05-22 02:26:27,931 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 487 transitions. Word has length 19 [2021-05-22 02:26:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:27,931 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 487 transitions. [2021-05-22 02:26:27,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 487 transitions. [2021-05-22 02:26:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:27,931 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:27,931 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:28,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2597 [2021-05-22 02:26:28,132 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:28,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:28,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1366655981, now seen corresponding path program 338 times [2021-05-22 02:26:28,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:28,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027181150] [2021-05-22 02:26:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:28,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:28,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027181150] [2021-05-22 02:26:28,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027181150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:28,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122272708] [2021-05-22 02:26:28,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:28,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:26:28,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:28,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:28,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:28,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122272708] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:28,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:28,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:28,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362892464] [2021-05-22 02:26:28,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:28,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:28,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:28,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:28,500 INFO L87 Difference]: Start difference. First operand 215 states and 487 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:28,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:28,825 INFO L93 Difference]: Finished difference Result 239 states and 529 transitions. [2021-05-22 02:26:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:26:28,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:28,826 INFO L225 Difference]: With dead ends: 239 [2021-05-22 02:26:28,826 INFO L226 Difference]: Without dead ends: 230 [2021-05-22 02:26:28,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 482.5ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:26:28,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-22 02:26:28,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 215. [2021-05-22 02:26:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2663551401869158) internal successors, (485), 214 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 485 transitions. [2021-05-22 02:26:28,828 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 485 transitions. Word has length 19 [2021-05-22 02:26:28,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:28,828 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 485 transitions. [2021-05-22 02:26:28,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:28,828 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 485 transitions. [2021-05-22 02:26:28,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:28,828 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:28,828 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:29,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2604,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:29,029 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:29,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:29,029 INFO L82 PathProgramCache]: Analyzing trace with hash -666285710, now seen corresponding path program 339 times [2021-05-22 02:26:29,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:29,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980855685] [2021-05-22 02:26:29,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:29,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:29,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980855685] [2021-05-22 02:26:29,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980855685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:29,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733945632] [2021-05-22 02:26:29,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:29,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:26:29,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:29,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:29,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:29,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733945632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:29,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:29,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:29,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196561646] [2021-05-22 02:26:29,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:29,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:29,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:29,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:29,324 INFO L87 Difference]: Start difference. First operand 215 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:29,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:29,750 INFO L93 Difference]: Finished difference Result 258 states and 569 transitions. [2021-05-22 02:26:29,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:26:29,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:29,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:29,751 INFO L225 Difference]: With dead ends: 258 [2021-05-22 02:26:29,751 INFO L226 Difference]: Without dead ends: 258 [2021-05-22 02:26:29,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 458.3ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:26:29,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-22 02:26:29,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 214. [2021-05-22 02:26:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.267605633802817) internal successors, (483), 213 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:29,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 483 transitions. [2021-05-22 02:26:29,753 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 483 transitions. Word has length 19 [2021-05-22 02:26:29,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:29,753 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 483 transitions. [2021-05-22 02:26:29,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:29,753 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 483 transitions. [2021-05-22 02:26:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:29,753 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:29,753 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:29,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2612 [2021-05-22 02:26:29,954 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:29,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:29,954 INFO L82 PathProgramCache]: Analyzing trace with hash -159939444, now seen corresponding path program 340 times [2021-05-22 02:26:29,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:29,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331220158] [2021-05-22 02:26:29,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:29,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:30,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:30,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331220158] [2021-05-22 02:26:30,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331220158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:30,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831568792] [2021-05-22 02:26:30,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:30,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:26:30,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:30,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:30,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:30,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831568792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:30,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:30,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:30,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443013027] [2021-05-22 02:26:30,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:30,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:30,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:30,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:30,241 INFO L87 Difference]: Start difference. First operand 214 states and 483 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:30,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:30,481 INFO L93 Difference]: Finished difference Result 246 states and 543 transitions. [2021-05-22 02:26:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:30,482 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:30,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:30,482 INFO L225 Difference]: With dead ends: 246 [2021-05-22 02:26:30,482 INFO L226 Difference]: Without dead ends: 246 [2021-05-22 02:26:30,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 274.0ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:26:30,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-22 02:26:30,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 210. [2021-05-22 02:26:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-05-22 02:26:30,484 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-05-22 02:26:30,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:30,484 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-05-22 02:26:30,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:30,484 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-05-22 02:26:30,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:30,484 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:30,484 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:30,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2617,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:30,685 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:30,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:30,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1533464087, now seen corresponding path program 341 times [2021-05-22 02:26:30,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:30,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334024875] [2021-05-22 02:26:30,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:30,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:30,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334024875] [2021-05-22 02:26:30,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334024875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:30,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420800246] [2021-05-22 02:26:30,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:30,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:26:30,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:30,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:30,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:30,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420800246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:30,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:30,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:30,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318242501] [2021-05-22 02:26:30,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:30,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:30,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:30,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:30,981 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:31,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:31,149 INFO L93 Difference]: Finished difference Result 232 states and 515 transitions. [2021-05-22 02:26:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:31,149 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:31,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:31,150 INFO L225 Difference]: With dead ends: 232 [2021-05-22 02:26:31,150 INFO L226 Difference]: Without dead ends: 232 [2021-05-22 02:26:31,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:31,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-22 02:26:31,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 210. [2021-05-22 02:26:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-05-22 02:26:31,152 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-05-22 02:26:31,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:31,152 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-05-22 02:26:31,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:31,152 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-05-22 02:26:31,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:31,152 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:31,152 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:31,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2622,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:31,357 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:31,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:31,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1690507745, now seen corresponding path program 342 times [2021-05-22 02:26:31,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:31,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467930005] [2021-05-22 02:26:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:31,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:31,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467930005] [2021-05-22 02:26:31,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467930005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:31,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465557230] [2021-05-22 02:26:31,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:31,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:26:31,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:31,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:26:31,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:31,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465557230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:31,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:31,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:31,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024804184] [2021-05-22 02:26:31,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:31,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:31,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:31,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:31,657 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:32,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:32,061 INFO L93 Difference]: Finished difference Result 247 states and 545 transitions. [2021-05-22 02:26:32,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:32,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:32,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:32,061 INFO L225 Difference]: With dead ends: 247 [2021-05-22 02:26:32,061 INFO L226 Difference]: Without dead ends: 247 [2021-05-22 02:26:32,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 421.2ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:26:32,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-22 02:26:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 210. [2021-05-22 02:26:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-05-22 02:26:32,063 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-05-22 02:26:32,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:32,064 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-05-22 02:26:32,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:32,064 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-05-22 02:26:32,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:32,064 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:32,064 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:32,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2627,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:32,264 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:32,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:32,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1807723799, now seen corresponding path program 343 times [2021-05-22 02:26:32,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:32,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253649263] [2021-05-22 02:26:32,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:32,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:32,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:32,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253649263] [2021-05-22 02:26:32,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253649263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:32,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785062852] [2021-05-22 02:26:32,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:32,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:32,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:32,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785062852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:32,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:32,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:32,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233967228] [2021-05-22 02:26:32,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:32,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:32,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:32,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:32,556 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:33,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:33,006 INFO L93 Difference]: Finished difference Result 262 states and 570 transitions. [2021-05-22 02:26:33,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:26:33,006 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:33,006 INFO L225 Difference]: With dead ends: 262 [2021-05-22 02:26:33,006 INFO L226 Difference]: Without dead ends: 259 [2021-05-22 02:26:33,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 455.2ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:26:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-05-22 02:26:33,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 210. [2021-05-22 02:26:33,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-05-22 02:26:33,008 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-05-22 02:26:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:33,008 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-05-22 02:26:33,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-05-22 02:26:33,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:33,009 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:33,009 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:33,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2632,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:33,209 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:33,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:33,209 INFO L82 PathProgramCache]: Analyzing trace with hash -680327706, now seen corresponding path program 344 times [2021-05-22 02:26:33,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:33,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485220510] [2021-05-22 02:26:33,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:33,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:33,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485220510] [2021-05-22 02:26:33,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485220510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:33,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658135239] [2021-05-22 02:26:33,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:33,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:26:33,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:33,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:33,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:33,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658135239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:33,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:33,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:33,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544167130] [2021-05-22 02:26:33,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:33,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:33,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:33,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:33,554 INFO L87 Difference]: Start difference. First operand 210 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:33,788 INFO L93 Difference]: Finished difference Result 238 states and 522 transitions. [2021-05-22 02:26:33,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:26:33,789 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:33,789 INFO L225 Difference]: With dead ends: 238 [2021-05-22 02:26:33,789 INFO L226 Difference]: Without dead ends: 236 [2021-05-22 02:26:33,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:26:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-22 02:26:33,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 206. [2021-05-22 02:26:33,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-05-22 02:26:33,791 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-05-22 02:26:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:33,791 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-05-22 02:26:33,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-05-22 02:26:33,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:33,791 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:33,791 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:33,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2639 [2021-05-22 02:26:33,992 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:33,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:33,992 INFO L82 PathProgramCache]: Analyzing trace with hash 207372807, now seen corresponding path program 345 times [2021-05-22 02:26:33,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:33,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273540339] [2021-05-22 02:26:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:34,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:34,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273540339] [2021-05-22 02:26:34,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273540339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:34,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71295792] [2021-05-22 02:26:34,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:34,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:26:34,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:34,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:34,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:34,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71295792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:34,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:34,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:34,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30120717] [2021-05-22 02:26:34,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:34,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:34,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:34,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:34,305 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:34,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:34,499 INFO L93 Difference]: Finished difference Result 235 states and 517 transitions. [2021-05-22 02:26:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:34,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:34,499 INFO L225 Difference]: With dead ends: 235 [2021-05-22 02:26:34,499 INFO L226 Difference]: Without dead ends: 235 [2021-05-22 02:26:34,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 289.9ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:26:34,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-22 02:26:34,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2021-05-22 02:26:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:34,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-05-22 02:26:34,501 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-05-22 02:26:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:34,502 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-05-22 02:26:34,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-05-22 02:26:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:34,502 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:34,502 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:34,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2647,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:34,702 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:34,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:34,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1004108559, now seen corresponding path program 346 times [2021-05-22 02:26:34,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:34,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800573987] [2021-05-22 02:26:34,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:34,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:34,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:34,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800573987] [2021-05-22 02:26:34,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800573987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:34,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895372762] [2021-05-22 02:26:34,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:34,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:26:34,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:34,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:34,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:35,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895372762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:35,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:35,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:35,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785131981] [2021-05-22 02:26:35,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:35,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:35,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:35,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:35,006 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:35,323 INFO L93 Difference]: Finished difference Result 258 states and 560 transitions. [2021-05-22 02:26:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:26:35,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:35,323 INFO L225 Difference]: With dead ends: 258 [2021-05-22 02:26:35,323 INFO L226 Difference]: Without dead ends: 255 [2021-05-22 02:26:35,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 412.6ms TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:26:35,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-22 02:26:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 209. [2021-05-22 02:26:35,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2403846153846154) internal successors, (466), 208 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:35,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 466 transitions. [2021-05-22 02:26:35,325 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 466 transitions. Word has length 19 [2021-05-22 02:26:35,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:35,325 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 466 transitions. [2021-05-22 02:26:35,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 466 transitions. [2021-05-22 02:26:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:35,326 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:35,326 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:35,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2652 [2021-05-22 02:26:35,526 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:35,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:35,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2131504652, now seen corresponding path program 347 times [2021-05-22 02:26:35,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:35,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406501842] [2021-05-22 02:26:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:35,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:35,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406501842] [2021-05-22 02:26:35,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406501842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:35,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126070931] [2021-05-22 02:26:35,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:35,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:26:35,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:35,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:35,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:35,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:35,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126070931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:35,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:35,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:35,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180868173] [2021-05-22 02:26:35,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:35,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:35,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:35,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:35,886 INFO L87 Difference]: Start difference. First operand 209 states and 466 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:36,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:36,616 INFO L93 Difference]: Finished difference Result 343 states and 704 transitions. [2021-05-22 02:26:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:26:36,617 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:36,617 INFO L225 Difference]: With dead ends: 343 [2021-05-22 02:26:36,617 INFO L226 Difference]: Without dead ends: 341 [2021-05-22 02:26:36,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 786.0ms TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:26:36,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-05-22 02:26:36,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 213. [2021-05-22 02:26:36,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2641509433962264) internal successors, (480), 212 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2021-05-22 02:26:36,620 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 19 [2021-05-22 02:26:36,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:36,620 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2021-05-22 02:26:36,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2021-05-22 02:26:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:36,620 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:36,620 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:36,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2659,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:36,821 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:36,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:36,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1510454825, now seen corresponding path program 348 times [2021-05-22 02:26:36,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:36,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005935007] [2021-05-22 02:26:36,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:36,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:36,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005935007] [2021-05-22 02:26:36,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005935007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:36,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694267921] [2021-05-22 02:26:36,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:36,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:26:36,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:36,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:36,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:37,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694267921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:37,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:37,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:37,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396578692] [2021-05-22 02:26:37,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:37,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:37,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:37,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:37,189 INFO L87 Difference]: Start difference. First operand 213 states and 480 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:37,375 INFO L93 Difference]: Finished difference Result 234 states and 522 transitions. [2021-05-22 02:26:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:37,375 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:37,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:37,376 INFO L225 Difference]: With dead ends: 234 [2021-05-22 02:26:37,376 INFO L226 Difference]: Without dead ends: 234 [2021-05-22 02:26:37,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 366.2ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:26:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-22 02:26:37,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 213. [2021-05-22 02:26:37,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2641509433962264) internal successors, (480), 212 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 480 transitions. [2021-05-22 02:26:37,378 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 480 transitions. Word has length 19 [2021-05-22 02:26:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:37,378 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 480 transitions. [2021-05-22 02:26:37,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:37,378 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 480 transitions. [2021-05-22 02:26:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:37,378 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:37,378 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:37,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2667,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:37,579 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:37,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:37,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1798005060, now seen corresponding path program 349 times [2021-05-22 02:26:37,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:37,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600516454] [2021-05-22 02:26:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:37,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:37,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600516454] [2021-05-22 02:26:37,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600516454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:37,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696761356] [2021-05-22 02:26:37,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:37,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:26:37,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:37,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696761356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:37,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:37,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:37,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584571359] [2021-05-22 02:26:37,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:37,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:37,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:37,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:37,952 INFO L87 Difference]: Start difference. First operand 213 states and 480 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:38,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:38,317 INFO L93 Difference]: Finished difference Result 277 states and 597 transitions. [2021-05-22 02:26:38,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:26:38,317 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:38,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:38,318 INFO L225 Difference]: With dead ends: 277 [2021-05-22 02:26:38,318 INFO L226 Difference]: Without dead ends: 277 [2021-05-22 02:26:38,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:26:38,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-05-22 02:26:38,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 210. [2021-05-22 02:26:38,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:38,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-05-22 02:26:38,320 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-05-22 02:26:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:38,320 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-05-22 02:26:38,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:38,320 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-05-22 02:26:38,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:38,320 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:38,320 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:38,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2675 [2021-05-22 02:26:38,521 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:38,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:38,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2099995340, now seen corresponding path program 350 times [2021-05-22 02:26:38,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:38,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006214277] [2021-05-22 02:26:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:38,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:38,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006214277] [2021-05-22 02:26:38,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006214277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:38,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509416149] [2021-05-22 02:26:38,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:38,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:26:38,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:38,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:38,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:38,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509416149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:38,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:38,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:38,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541209419] [2021-05-22 02:26:38,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:38,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:38,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:38,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:38,827 INFO L87 Difference]: Start difference. First operand 210 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:39,039 INFO L93 Difference]: Finished difference Result 248 states and 543 transitions. [2021-05-22 02:26:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:26:39,040 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:39,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:39,040 INFO L225 Difference]: With dead ends: 248 [2021-05-22 02:26:39,040 INFO L226 Difference]: Without dead ends: 248 [2021-05-22 02:26:39,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:26:39,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-22 02:26:39,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 205. [2021-05-22 02:26:39,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2401960784313726) internal successors, (457), 204 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 457 transitions. [2021-05-22 02:26:39,042 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 457 transitions. Word has length 19 [2021-05-22 02:26:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:39,042 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 457 transitions. [2021-05-22 02:26:39,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 457 transitions. [2021-05-22 02:26:39,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:39,042 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:39,043 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:39,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2681,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:39,243 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:39,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:39,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1474829985, now seen corresponding path program 351 times [2021-05-22 02:26:39,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:39,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981317278] [2021-05-22 02:26:39,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:39,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:39,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981317278] [2021-05-22 02:26:39,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981317278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:39,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714014241] [2021-05-22 02:26:39,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:39,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:26:39,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:39,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-22 02:26:39,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:39,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714014241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:39,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:39,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:26:39,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385918002] [2021-05-22 02:26:39,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:39,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:39,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:39,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:39,569 INFO L87 Difference]: Start difference. First operand 205 states and 457 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:39,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:39,733 INFO L93 Difference]: Finished difference Result 235 states and 517 transitions. [2021-05-22 02:26:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:26:39,734 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:39,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:39,734 INFO L225 Difference]: With dead ends: 235 [2021-05-22 02:26:39,734 INFO L226 Difference]: Without dead ends: 235 [2021-05-22 02:26:39,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:39,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-22 02:26:39,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 208. [2021-05-22 02:26:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-05-22 02:26:39,736 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-05-22 02:26:39,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:39,736 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-05-22 02:26:39,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:39,736 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-05-22 02:26:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:39,736 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:39,736 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:39,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2686,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:39,937 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:39,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:39,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2023401559, now seen corresponding path program 352 times [2021-05-22 02:26:39,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:39,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245277074] [2021-05-22 02:26:39,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:40,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:40,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245277074] [2021-05-22 02:26:40,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245277074] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:40,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655056044] [2021-05-22 02:26:40,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:40,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:26:40,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:40,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:40,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:40,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655056044] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:40,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:40,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:40,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338880301] [2021-05-22 02:26:40,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:40,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:40,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:40,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:40,238 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:40,364 INFO L93 Difference]: Finished difference Result 255 states and 554 transitions. [2021-05-22 02:26:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:26:40,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:40,365 INFO L225 Difference]: With dead ends: 255 [2021-05-22 02:26:40,365 INFO L226 Difference]: Without dead ends: 252 [2021-05-22 02:26:40,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:40,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-22 02:26:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 209. [2021-05-22 02:26:40,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2403846153846154) internal successors, (466), 208 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:40,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 466 transitions. [2021-05-22 02:26:40,367 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 466 transitions. Word has length 19 [2021-05-22 02:26:40,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:40,367 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 466 transitions. [2021-05-22 02:26:40,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:40,367 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 466 transitions. [2021-05-22 02:26:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:40,367 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:40,367 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:40,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2691,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:40,568 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:40,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:40,568 INFO L82 PathProgramCache]: Analyzing trace with hash -896005466, now seen corresponding path program 353 times [2021-05-22 02:26:40,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:40,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083976931] [2021-05-22 02:26:40,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:40,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:40,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083976931] [2021-05-22 02:26:40,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083976931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:40,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526297012] [2021-05-22 02:26:40,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:40,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:26:40,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:40,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:40,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:40,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526297012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:40,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:40,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:40,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643544673] [2021-05-22 02:26:40,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:40,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:40,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:40,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:40,917 INFO L87 Difference]: Start difference. First operand 209 states and 466 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:41,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:41,057 INFO L93 Difference]: Finished difference Result 231 states and 507 transitions. [2021-05-22 02:26:41,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:26:41,057 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:41,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:41,057 INFO L225 Difference]: With dead ends: 231 [2021-05-22 02:26:41,057 INFO L226 Difference]: Without dead ends: 229 [2021-05-22 02:26:41,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:41,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-22 02:26:41,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 207. [2021-05-22 02:26:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.237864077669903) internal successors, (461), 206 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 461 transitions. [2021-05-22 02:26:41,059 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 461 transitions. Word has length 19 [2021-05-22 02:26:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:41,059 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 461 transitions. [2021-05-22 02:26:41,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 461 transitions. [2021-05-22 02:26:41,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:41,059 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:41,059 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:41,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2698,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:41,260 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:41,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1517055293, now seen corresponding path program 354 times [2021-05-22 02:26:41,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:41,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210091046] [2021-05-22 02:26:41,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:41,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:41,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210091046] [2021-05-22 02:26:41,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210091046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:41,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459885425] [2021-05-22 02:26:41,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:41,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:26:41,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:41,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:41,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:41,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459885425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:41,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:41,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:41,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571206829] [2021-05-22 02:26:41,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:41,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:41,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:41,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:41,616 INFO L87 Difference]: Start difference. First operand 207 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:41,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:41,893 INFO L93 Difference]: Finished difference Result 225 states and 497 transitions. [2021-05-22 02:26:41,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:26:41,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:41,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:41,893 INFO L225 Difference]: With dead ends: 225 [2021-05-22 02:26:41,893 INFO L226 Difference]: Without dead ends: 225 [2021-05-22 02:26:41,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 404.1ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:26:41,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-22 02:26:41,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 209. [2021-05-22 02:26:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.235576923076923) internal successors, (465), 208 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:41,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 465 transitions. [2021-05-22 02:26:41,895 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 465 transitions. Word has length 19 [2021-05-22 02:26:41,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:41,895 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 465 transitions. [2021-05-22 02:26:41,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:41,896 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 465 transitions. [2021-05-22 02:26:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:41,896 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:41,896 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:42,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2706,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:42,096 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:42,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:42,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1229505058, now seen corresponding path program 355 times [2021-05-22 02:26:42,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:42,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921686591] [2021-05-22 02:26:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:42,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:42,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921686591] [2021-05-22 02:26:42,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921686591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:42,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180894543] [2021-05-22 02:26:42,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:42,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:42,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:42,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180894543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:42,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:42,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:42,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081593420] [2021-05-22 02:26:42,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:42,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:42,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:42,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:42,398 INFO L87 Difference]: Start difference. First operand 209 states and 465 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:42,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:42,733 INFO L93 Difference]: Finished difference Result 267 states and 577 transitions. [2021-05-22 02:26:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:42,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:42,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:42,733 INFO L225 Difference]: With dead ends: 267 [2021-05-22 02:26:42,733 INFO L226 Difference]: Without dead ends: 267 [2021-05-22 02:26:42,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:26:42,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-05-22 02:26:42,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 210. [2021-05-22 02:26:42,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:42,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-05-22 02:26:42,736 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-05-22 02:26:42,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:42,736 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-05-22 02:26:42,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:42,736 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-05-22 02:26:42,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:42,736 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:42,736 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:42,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:42,936 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:42,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash -927514778, now seen corresponding path program 356 times [2021-05-22 02:26:42,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:42,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493556505] [2021-05-22 02:26:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:43,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:43,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493556505] [2021-05-22 02:26:43,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493556505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:43,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616170634] [2021-05-22 02:26:43,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:43,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:26:43,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:43,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:43,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:43,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616170634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:43,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:43,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:43,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486830857] [2021-05-22 02:26:43,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:43,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:43,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:43,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:43,236 INFO L87 Difference]: Start difference. First operand 210 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:43,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:43,466 INFO L93 Difference]: Finished difference Result 241 states and 529 transitions. [2021-05-22 02:26:43,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:26:43,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:43,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:43,467 INFO L225 Difference]: With dead ends: 241 [2021-05-22 02:26:43,467 INFO L226 Difference]: Without dead ends: 241 [2021-05-22 02:26:43,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:26:43,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-22 02:26:43,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2021-05-22 02:26:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:43,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-05-22 02:26:43,469 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-05-22 02:26:43,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:43,469 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-05-22 02:26:43,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:43,469 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-05-22 02:26:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:43,469 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:43,469 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:43,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2721 [2021-05-22 02:26:43,670 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:43,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1294777065, now seen corresponding path program 357 times [2021-05-22 02:26:43,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:43,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462997665] [2021-05-22 02:26:43,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:43,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:43,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462997665] [2021-05-22 02:26:43,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462997665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:43,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805447671] [2021-05-22 02:26:43,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:43,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:26:43,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:43,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:43,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:44,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805447671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:44,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:44,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:44,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596066573] [2021-05-22 02:26:44,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:44,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:44,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:44,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:44,027 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:44,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:44,326 INFO L93 Difference]: Finished difference Result 237 states and 521 transitions. [2021-05-22 02:26:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:26:44,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:44,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:44,326 INFO L225 Difference]: With dead ends: 237 [2021-05-22 02:26:44,326 INFO L226 Difference]: Without dead ends: 237 [2021-05-22 02:26:44,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 412.4ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:26:44,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-22 02:26:44,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 209. [2021-05-22 02:26:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.235576923076923) internal successors, (465), 208 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 465 transitions. [2021-05-22 02:26:44,328 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 465 transitions. Word has length 19 [2021-05-22 02:26:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:44,329 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 465 transitions. [2021-05-22 02:26:44,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 465 transitions. [2021-05-22 02:26:44,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:44,329 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:44,329 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:44,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2726,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:44,529 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:44,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:44,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1582327300, now seen corresponding path program 358 times [2021-05-22 02:26:44,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:44,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150739344] [2021-05-22 02:26:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:44,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:44,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150739344] [2021-05-22 02:26:44,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150739344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:44,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431651908] [2021-05-22 02:26:44,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:44,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:26:44,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:44,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:26:44,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:44,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431651908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:44,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:44,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:44,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288357509] [2021-05-22 02:26:44,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:44,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:44,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:44,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:44,843 INFO L87 Difference]: Start difference. First operand 209 states and 465 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:45,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:45,320 INFO L93 Difference]: Finished difference Result 278 states and 599 transitions. [2021-05-22 02:26:45,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:26:45,320 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:45,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:45,320 INFO L225 Difference]: With dead ends: 278 [2021-05-22 02:26:45,320 INFO L226 Difference]: Without dead ends: 278 [2021-05-22 02:26:45,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 548.4ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:26:45,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-22 02:26:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 211. [2021-05-22 02:26:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-05-22 02:26:45,322 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-05-22 02:26:45,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:45,323 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-05-22 02:26:45,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:45,323 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-05-22 02:26:45,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:45,323 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:45,323 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:45,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2734 [2021-05-22 02:26:45,523 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:45,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:45,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1884317580, now seen corresponding path program 359 times [2021-05-22 02:26:45,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:45,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378138781] [2021-05-22 02:26:45,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:45,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:45,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378138781] [2021-05-22 02:26:45,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378138781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:45,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047648498] [2021-05-22 02:26:45,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:45,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:26:45,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:45,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:45,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:45,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047648498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:45,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:45,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:45,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786319890] [2021-05-22 02:26:45,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:45,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:45,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:45,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:45,832 INFO L87 Difference]: Start difference. First operand 211 states and 473 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:46,220 INFO L93 Difference]: Finished difference Result 254 states and 557 transitions. [2021-05-22 02:26:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:46,220 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:46,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:46,220 INFO L225 Difference]: With dead ends: 254 [2021-05-22 02:26:46,220 INFO L226 Difference]: Without dead ends: 254 [2021-05-22 02:26:46,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 461.0ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:26:46,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-22 02:26:46,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 210. [2021-05-22 02:26:46,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2535885167464116) internal successors, (471), 209 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 471 transitions. [2021-05-22 02:26:46,223 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 471 transitions. Word has length 19 [2021-05-22 02:26:46,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:46,223 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 471 transitions. [2021-05-22 02:26:46,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:46,223 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 471 transitions. [2021-05-22 02:26:46,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:46,223 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:46,223 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:46,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2740,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:46,423 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:46,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1904303450, now seen corresponding path program 360 times [2021-05-22 02:26:46,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:46,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004499802] [2021-05-22 02:26:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:46,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:46,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004499802] [2021-05-22 02:26:46,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004499802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:46,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457712152] [2021-05-22 02:26:46,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:46,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:26:46,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:46,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:46,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457712152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:46,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:46,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:46,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349565204] [2021-05-22 02:26:46,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:46,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:46,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:46,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:46,701 INFO L87 Difference]: Start difference. First operand 210 states and 471 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:46,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:46,860 INFO L93 Difference]: Finished difference Result 242 states and 531 transitions. [2021-05-22 02:26:46,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:26:46,860 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:46,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:46,861 INFO L225 Difference]: With dead ends: 242 [2021-05-22 02:26:46,861 INFO L226 Difference]: Without dead ends: 242 [2021-05-22 02:26:46,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:26:46,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-22 02:26:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 206. [2021-05-22 02:26:46,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:46,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-05-22 02:26:46,863 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-05-22 02:26:46,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:46,863 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-05-22 02:26:46,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:46,863 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-05-22 02:26:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:46,863 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:46,863 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:47,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2745 [2021-05-22 02:26:47,064 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:47,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2111296839, now seen corresponding path program 361 times [2021-05-22 02:26:47,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:47,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637434938] [2021-05-22 02:26:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:47,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:47,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637434938] [2021-05-22 02:26:47,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637434938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:47,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981221549] [2021-05-22 02:26:47,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:47,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:47,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:47,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981221549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:47,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:47,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:47,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312509367] [2021-05-22 02:26:47,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:47,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:47,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:47,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:47,373 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:47,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:47,496 INFO L93 Difference]: Finished difference Result 236 states and 519 transitions. [2021-05-22 02:26:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:26:47,496 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:47,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:47,496 INFO L225 Difference]: With dead ends: 236 [2021-05-22 02:26:47,496 INFO L226 Difference]: Without dead ends: 236 [2021-05-22 02:26:47,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-22 02:26:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 209. [2021-05-22 02:26:47,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.235576923076923) internal successors, (465), 208 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:47,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 465 transitions. [2021-05-22 02:26:47,498 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 465 transitions. Word has length 19 [2021-05-22 02:26:47,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:47,498 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 465 transitions. [2021-05-22 02:26:47,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:47,498 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 465 transitions. [2021-05-22 02:26:47,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:47,499 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:47,499 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:47,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2750 [2021-05-22 02:26:47,699 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:47,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1386934705, now seen corresponding path program 362 times [2021-05-22 02:26:47,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:47,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004058716] [2021-05-22 02:26:47,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:47,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:47,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004058716] [2021-05-22 02:26:47,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004058716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:47,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644860040] [2021-05-22 02:26:47,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:47,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:26:47,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:47,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:47,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:47,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644860040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:47,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:47,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:47,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360105852] [2021-05-22 02:26:47,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:47,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:47,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:47,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:47,997 INFO L87 Difference]: Start difference. First operand 209 states and 465 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:48,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:48,188 INFO L93 Difference]: Finished difference Result 256 states and 556 transitions. [2021-05-22 02:26:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:48,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:48,188 INFO L225 Difference]: With dead ends: 256 [2021-05-22 02:26:48,188 INFO L226 Difference]: Without dead ends: 253 [2021-05-22 02:26:48,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:48,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-22 02:26:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2021-05-22 02:26:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2392344497607657) internal successors, (468), 209 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 468 transitions. [2021-05-22 02:26:48,191 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 468 transitions. Word has length 19 [2021-05-22 02:26:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:48,191 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 468 transitions. [2021-05-22 02:26:48,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 468 transitions. [2021-05-22 02:26:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:48,191 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:48,191 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:48,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2755,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:48,391 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:48,392 INFO L82 PathProgramCache]: Analyzing trace with hash -259538612, now seen corresponding path program 363 times [2021-05-22 02:26:48,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:48,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700556178] [2021-05-22 02:26:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:48,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:48,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700556178] [2021-05-22 02:26:48,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700556178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:48,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10492039] [2021-05-22 02:26:48,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:48,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:26:48,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:48,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:48,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:48,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10492039] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:48,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:48,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:48,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390833011] [2021-05-22 02:26:48,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:48,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:48,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:48,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:48,740 INFO L87 Difference]: Start difference. First operand 210 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:48,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:48,881 INFO L93 Difference]: Finished difference Result 232 states and 509 transitions. [2021-05-22 02:26:48,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:48,881 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:48,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:48,882 INFO L225 Difference]: With dead ends: 232 [2021-05-22 02:26:48,882 INFO L226 Difference]: Without dead ends: 230 [2021-05-22 02:26:48,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-22 02:26:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 208. [2021-05-22 02:26:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-05-22 02:26:48,883 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-05-22 02:26:48,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:48,883 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-05-22 02:26:48,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-05-22 02:26:48,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:48,884 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:48,884 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:49,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2762 [2021-05-22 02:26:49,084 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:49,085 INFO L82 PathProgramCache]: Analyzing trace with hash -880588439, now seen corresponding path program 364 times [2021-05-22 02:26:49,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:49,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36998744] [2021-05-22 02:26:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:49,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:49,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36998744] [2021-05-22 02:26:49,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36998744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:49,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134563488] [2021-05-22 02:26:49,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:49,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:26:49,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:49,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:49,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:49,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134563488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:49,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:49,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:49,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322745923] [2021-05-22 02:26:49,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:49,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:49,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:49,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:49,442 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:49,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:49,647 INFO L93 Difference]: Finished difference Result 227 states and 501 transitions. [2021-05-22 02:26:49,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:26:49,648 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:49,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:49,648 INFO L225 Difference]: With dead ends: 227 [2021-05-22 02:26:49,648 INFO L226 Difference]: Without dead ends: 227 [2021-05-22 02:26:49,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 336.6ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:26:49,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-22 02:26:49,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 210. [2021-05-22 02:26:49,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2344497607655502) internal successors, (467), 209 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 467 transitions. [2021-05-22 02:26:49,650 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 467 transitions. Word has length 19 [2021-05-22 02:26:49,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:49,650 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 467 transitions. [2021-05-22 02:26:49,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:49,650 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 467 transitions. [2021-05-22 02:26:49,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:49,650 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:49,650 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:49,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2770,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:49,865 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:49,865 INFO L82 PathProgramCache]: Analyzing trace with hash -593038204, now seen corresponding path program 365 times [2021-05-22 02:26:49,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:49,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134032589] [2021-05-22 02:26:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:49,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:49,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134032589] [2021-05-22 02:26:49,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134032589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:49,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347776883] [2021-05-22 02:26:49,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:50,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:26:50,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:50,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:50,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:50,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347776883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:50,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:50,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:50,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776548513] [2021-05-22 02:26:50,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:50,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:50,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:50,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:50,171 INFO L87 Difference]: Start difference. First operand 210 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:50,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:50,489 INFO L93 Difference]: Finished difference Result 261 states and 565 transitions. [2021-05-22 02:26:50,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:26:50,489 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:50,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:50,490 INFO L225 Difference]: With dead ends: 261 [2021-05-22 02:26:50,490 INFO L226 Difference]: Without dead ends: 261 [2021-05-22 02:26:50,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 399.3ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:26:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-22 02:26:50,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 211. [2021-05-22 02:26:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2476190476190476) internal successors, (472), 210 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 472 transitions. [2021-05-22 02:26:50,492 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 472 transitions. Word has length 19 [2021-05-22 02:26:50,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:50,492 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 472 transitions. [2021-05-22 02:26:50,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:50,492 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 472 transitions. [2021-05-22 02:26:50,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:50,492 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:50,492 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:50,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2778 [2021-05-22 02:26:50,693 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:50,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:50,693 INFO L82 PathProgramCache]: Analyzing trace with hash -291047924, now seen corresponding path program 366 times [2021-05-22 02:26:50,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:50,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125014685] [2021-05-22 02:26:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:50,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:50,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125014685] [2021-05-22 02:26:50,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125014685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:50,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599655146] [2021-05-22 02:26:50,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:50,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:26:50,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:50,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:50,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:50,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599655146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:50,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:50,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:50,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251793408] [2021-05-22 02:26:50,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:50,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:50,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:50,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:50,993 INFO L87 Difference]: Start difference. First operand 211 states and 472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:51,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:51,213 INFO L93 Difference]: Finished difference Result 241 states and 529 transitions. [2021-05-22 02:26:51,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:51,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:51,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:51,213 INFO L225 Difference]: With dead ends: 241 [2021-05-22 02:26:51,213 INFO L226 Difference]: Without dead ends: 241 [2021-05-22 02:26:51,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 325.0ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:26:51,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-22 02:26:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 207. [2021-05-22 02:26:51,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.237864077669903) internal successors, (461), 206 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:51,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 461 transitions. [2021-05-22 02:26:51,215 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 461 transitions. Word has length 19 [2021-05-22 02:26:51,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:51,215 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 461 transitions. [2021-05-22 02:26:51,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:51,215 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 461 transitions. [2021-05-22 02:26:51,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:51,216 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:51,216 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:51,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2785,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:51,416 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:51,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:51,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1931243919, now seen corresponding path program 367 times [2021-05-22 02:26:51,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:51,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853758511] [2021-05-22 02:26:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:51,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:51,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853758511] [2021-05-22 02:26:51,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853758511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:51,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778220215] [2021-05-22 02:26:51,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:51,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:51,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:51,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:51,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778220215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:51,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:51,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:51,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113917342] [2021-05-22 02:26:51,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:51,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:51,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:51,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:51,768 INFO L87 Difference]: Start difference. First operand 207 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:51,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:51,981 INFO L93 Difference]: Finished difference Result 227 states and 501 transitions. [2021-05-22 02:26:51,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:26:51,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:51,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:51,981 INFO L225 Difference]: With dead ends: 227 [2021-05-22 02:26:51,981 INFO L226 Difference]: Without dead ends: 227 [2021-05-22 02:26:51,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 368.4ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:26:51,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-22 02:26:51,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 210. [2021-05-22 02:26:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2344497607655502) internal successors, (467), 209 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 467 transitions. [2021-05-22 02:26:51,983 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 467 transitions. Word has length 19 [2021-05-22 02:26:51,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:51,983 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 467 transitions. [2021-05-22 02:26:51,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:51,983 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 467 transitions. [2021-05-22 02:26:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:51,983 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:51,983 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:52,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2790,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:52,184 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:52,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2076173142, now seen corresponding path program 368 times [2021-05-22 02:26:52,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:52,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39887480] [2021-05-22 02:26:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:52,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:52,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39887480] [2021-05-22 02:26:52,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39887480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:52,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877658416] [2021-05-22 02:26:52,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:52,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:26:52,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:52,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:52,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:52,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877658416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:52,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:52,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:52,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696450937] [2021-05-22 02:26:52,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:52,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:52,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:52,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:52,468 INFO L87 Difference]: Start difference. First operand 210 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:52,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:52,976 INFO L93 Difference]: Finished difference Result 280 states and 603 transitions. [2021-05-22 02:26:52,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:26:52,976 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:52,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:52,976 INFO L225 Difference]: With dead ends: 280 [2021-05-22 02:26:52,976 INFO L226 Difference]: Without dead ends: 280 [2021-05-22 02:26:52,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 534.4ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:26:52,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-22 02:26:52,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 212. [2021-05-22 02:26:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.251184834123223) internal successors, (475), 211 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:52,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 475 transitions. [2021-05-22 02:26:52,978 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 475 transitions. Word has length 19 [2021-05-22 02:26:52,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:52,978 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 475 transitions. [2021-05-22 02:26:52,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 475 transitions. [2021-05-22 02:26:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:52,979 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:52,979 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:53,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2798,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:53,194 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:53,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:53,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1774182862, now seen corresponding path program 369 times [2021-05-22 02:26:53,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:53,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777024557] [2021-05-22 02:26:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:53,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:53,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777024557] [2021-05-22 02:26:53,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777024557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:53,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434137609] [2021-05-22 02:26:53,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:53,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:26:53,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:53,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:53,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:53,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434137609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:53,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:53,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:53,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120091637] [2021-05-22 02:26:53,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:53,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:53,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:53,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:53,488 INFO L87 Difference]: Start difference. First operand 212 states and 475 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:53,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:53,926 INFO L93 Difference]: Finished difference Result 252 states and 553 transitions. [2021-05-22 02:26:53,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:53,926 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:53,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:53,926 INFO L225 Difference]: With dead ends: 252 [2021-05-22 02:26:53,927 INFO L226 Difference]: Without dead ends: 252 [2021-05-22 02:26:53,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 504.7ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:26:53,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-22 02:26:53,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 211. [2021-05-22 02:26:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.2523809523809524) internal successors, (473), 210 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:53,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 473 transitions. [2021-05-22 02:26:53,929 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 473 transitions. Word has length 19 [2021-05-22 02:26:53,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:53,929 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 473 transitions. [2021-05-22 02:26:53,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:53,929 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 473 transitions. [2021-05-22 02:26:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:53,932 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:53,932 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:54,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2805,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:54,141 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:54,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:54,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1267836596, now seen corresponding path program 370 times [2021-05-22 02:26:54,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:54,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503854849] [2021-05-22 02:26:54,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:54,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:54,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503854849] [2021-05-22 02:26:54,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503854849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:54,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33237941] [2021-05-22 02:26:54,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:54,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:26:54,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:54,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:54,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:54,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33237941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:54,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:54,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:26:54,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192422700] [2021-05-22 02:26:54,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:26:54,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:54,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:26:54,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:26:54,422 INFO L87 Difference]: Start difference. First operand 211 states and 473 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:54,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:54,645 INFO L93 Difference]: Finished difference Result 243 states and 533 transitions. [2021-05-22 02:26:54,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:26:54,645 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:54,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:54,645 INFO L225 Difference]: With dead ends: 243 [2021-05-22 02:26:54,645 INFO L226 Difference]: Without dead ends: 243 [2021-05-22 02:26:54,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:26:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-22 02:26:54,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 206. [2021-05-22 02:26:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-05-22 02:26:54,647 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-05-22 02:26:54,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:54,647 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-05-22 02:26:54,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:54,648 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-05-22 02:26:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:54,648 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:54,648 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:54,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2810 [2021-05-22 02:26:54,861 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:54,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1096266199, now seen corresponding path program 371 times [2021-05-22 02:26:54,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:54,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75821676] [2021-05-22 02:26:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:54,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:54,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75821676] [2021-05-22 02:26:54,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75821676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:54,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986667981] [2021-05-22 02:26:54,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:54,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:26:54,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:54,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:54,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:55,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986667981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:55,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:55,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:26:55,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469913374] [2021-05-22 02:26:55,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:55,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:55,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:55,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:55,234 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:55,552 INFO L93 Difference]: Finished difference Result 228 states and 503 transitions. [2021-05-22 02:26:55,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:26:55,553 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:55,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:55,553 INFO L225 Difference]: With dead ends: 228 [2021-05-22 02:26:55,553 INFO L226 Difference]: Without dead ends: 228 [2021-05-22 02:26:55,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 475.3ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:26:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-22 02:26:55,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 210. [2021-05-22 02:26:55,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.2344497607655502) internal successors, (467), 209 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 467 transitions. [2021-05-22 02:26:55,555 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 467 transitions. Word has length 19 [2021-05-22 02:26:55,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:55,555 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 467 transitions. [2021-05-22 02:26:55,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:55,555 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 467 transitions. [2021-05-22 02:26:55,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:55,555 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:55,555 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:55,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2815,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:55,756 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:55,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:55,756 INFO L82 PathProgramCache]: Analyzing trace with hash -808715964, now seen corresponding path program 372 times [2021-05-22 02:26:55,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:55,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491134870] [2021-05-22 02:26:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:55,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:55,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491134870] [2021-05-22 02:26:55,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491134870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:55,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867122387] [2021-05-22 02:26:55,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:55,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:26:55,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:55,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:55,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:56,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867122387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:56,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:56,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:26:56,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618258896] [2021-05-22 02:26:56,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:56,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:56,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:56,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:56,051 INFO L87 Difference]: Start difference. First operand 210 states and 467 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:56,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:56,762 INFO L93 Difference]: Finished difference Result 276 states and 595 transitions. [2021-05-22 02:26:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:26:56,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:56,763 INFO L225 Difference]: With dead ends: 276 [2021-05-22 02:26:56,763 INFO L226 Difference]: Without dead ends: 276 [2021-05-22 02:26:56,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 711.2ms TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:26:56,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-22 02:26:56,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 213. [2021-05-22 02:26:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2547169811320753) internal successors, (478), 212 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:56,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 478 transitions. [2021-05-22 02:26:56,765 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 478 transitions. Word has length 19 [2021-05-22 02:26:56,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:56,765 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 478 transitions. [2021-05-22 02:26:56,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 478 transitions. [2021-05-22 02:26:56,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:56,765 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:56,765 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:56,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2823 [2021-05-22 02:26:56,966 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:56,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:56,966 INFO L82 PathProgramCache]: Analyzing trace with hash -506725684, now seen corresponding path program 373 times [2021-05-22 02:26:56,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:56,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568112281] [2021-05-22 02:26:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:57,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:57,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568112281] [2021-05-22 02:26:57,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568112281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:57,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189549782] [2021-05-22 02:26:57,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:57,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:57,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:57,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189549782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:57,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:57,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:26:57,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374675071] [2021-05-22 02:26:57,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:57,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:57,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:57,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:57,264 INFO L87 Difference]: Start difference. First operand 213 states and 478 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:57,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:57,868 INFO L93 Difference]: Finished difference Result 265 states and 579 transitions. [2021-05-22 02:26:57,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:26:57,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:57,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:57,868 INFO L225 Difference]: With dead ends: 265 [2021-05-22 02:26:57,868 INFO L226 Difference]: Without dead ends: 265 [2021-05-22 02:26:57,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 633.7ms TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:26:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-22 02:26:57,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 212. [2021-05-22 02:26:57,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.255924170616114) internal successors, (476), 211 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:57,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 476 transitions. [2021-05-22 02:26:57,871 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 476 transitions. Word has length 19 [2021-05-22 02:26:57,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:57,871 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 476 transitions. [2021-05-22 02:26:57,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:57,871 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 476 transitions. [2021-05-22 02:26:57,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:57,871 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:57,871 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:58,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2830 [2021-05-22 02:26:58,086 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:58,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:58,086 INFO L82 PathProgramCache]: Analyzing trace with hash -379418, now seen corresponding path program 374 times [2021-05-22 02:26:58,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:58,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680121219] [2021-05-22 02:26:58,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:58,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:58,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680121219] [2021-05-22 02:26:58,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680121219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:58,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13725662] [2021-05-22 02:26:58,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:58,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:26:58,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:58,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:58,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:58,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13725662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:58,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:58,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:26:58,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477141331] [2021-05-22 02:26:58,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:58,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:58,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:58,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:58,373 INFO L87 Difference]: Start difference. First operand 212 states and 476 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:58,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:58,878 INFO L93 Difference]: Finished difference Result 259 states and 568 transitions. [2021-05-22 02:26:58,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:26:58,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:58,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:58,878 INFO L225 Difference]: With dead ends: 259 [2021-05-22 02:26:58,878 INFO L226 Difference]: Without dead ends: 259 [2021-05-22 02:26:58,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 583.7ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:26:58,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-05-22 02:26:58,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 211. [2021-05-22 02:26:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.257142857142857) internal successors, (474), 210 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 474 transitions. [2021-05-22 02:26:58,880 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 474 transitions. Word has length 19 [2021-05-22 02:26:58,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:58,880 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 474 transitions. [2021-05-22 02:26:58,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 474 transitions. [2021-05-22 02:26:58,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:58,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:58,881 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:59,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2835,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:59,081 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:59,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:59,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1483514356, now seen corresponding path program 375 times [2021-05-22 02:26:59,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:59,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573486127] [2021-05-22 02:26:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:59,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:59,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573486127] [2021-05-22 02:26:59,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573486127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:59,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977407371] [2021-05-22 02:26:59,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:59,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:26:59,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:59,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:26:59,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:26:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:59,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977407371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:59,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:26:59,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:26:59,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203757499] [2021-05-22 02:26:59,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:26:59,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:26:59,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:26:59,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:26:59,360 INFO L87 Difference]: Start difference. First operand 211 states and 474 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:26:59,648 INFO L93 Difference]: Finished difference Result 239 states and 525 transitions. [2021-05-22 02:26:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:26:59,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:26:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:26:59,648 INFO L225 Difference]: With dead ends: 239 [2021-05-22 02:26:59,648 INFO L226 Difference]: Without dead ends: 239 [2021-05-22 02:26:59,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 348.6ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:26:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-22 02:26:59,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 208. [2021-05-22 02:26:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.241545893719807) internal successors, (464), 207 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 464 transitions. [2021-05-22 02:26:59,650 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 464 transitions. Word has length 19 [2021-05-22 02:26:59,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:26:59,650 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 464 transitions. [2021-05-22 02:26:59,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:26:59,651 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 464 transitions. [2021-05-22 02:26:59,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:26:59,651 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:26:59,651 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:26:59,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2840 [2021-05-22 02:26:59,851 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:26:59,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:26:59,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1717344001, now seen corresponding path program 376 times [2021-05-22 02:26:59,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:26:59,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484107858] [2021-05-22 02:26:59,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:26:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:26:59,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:26:59,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:26:59,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484107858] [2021-05-22 02:26:59,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484107858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:26:59,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248756107] [2021-05-22 02:26:59,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:26:59,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:26:59,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:26:59,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:26:59,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:00,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248756107] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:00,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:00,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:27:00,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546249066] [2021-05-22 02:27:00,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:00,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:00,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:00,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:00,107 INFO L87 Difference]: Start difference. First operand 208 states and 464 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:00,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:00,319 INFO L93 Difference]: Finished difference Result 220 states and 488 transitions. [2021-05-22 02:27:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:27:00,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:00,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:00,320 INFO L225 Difference]: With dead ends: 220 [2021-05-22 02:27:00,320 INFO L226 Difference]: Without dead ends: 220 [2021-05-22 02:27:00,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 278.5ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:27:00,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-22 02:27:00,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2021-05-22 02:27:00,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.241545893719807) internal successors, (464), 207 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 464 transitions. [2021-05-22 02:27:00,322 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 464 transitions. Word has length 19 [2021-05-22 02:27:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:00,322 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 464 transitions. [2021-05-22 02:27:00,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:00,322 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 464 transitions. [2021-05-22 02:27:00,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:00,322 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:00,322 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:00,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2845,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:00,529 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:00,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:00,529 INFO L82 PathProgramCache]: Analyzing trace with hash -558465017, now seen corresponding path program 377 times [2021-05-22 02:27:00,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:00,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183900562] [2021-05-22 02:27:00,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:00,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:00,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183900562] [2021-05-22 02:27:00,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183900562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:00,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305037547] [2021-05-22 02:27:00,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:00,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:27:00,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:00,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:00,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:00,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305037547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:00,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:00,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:27:00,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377234953] [2021-05-22 02:27:00,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:00,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:00,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:00,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:00,800 INFO L87 Difference]: Start difference. First operand 208 states and 464 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:01,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:01,176 INFO L93 Difference]: Finished difference Result 236 states and 520 transitions. [2021-05-22 02:27:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:01,177 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:01,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:01,177 INFO L225 Difference]: With dead ends: 236 [2021-05-22 02:27:01,177 INFO L226 Difference]: Without dead ends: 236 [2021-05-22 02:27:01,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 450.8ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:27:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-22 02:27:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-05-22 02:27:01,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.241545893719807) internal successors, (464), 207 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 464 transitions. [2021-05-22 02:27:01,179 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 464 transitions. Word has length 19 [2021-05-22 02:27:01,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:01,179 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 464 transitions. [2021-05-22 02:27:01,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:01,179 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 464 transitions. [2021-05-22 02:27:01,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:01,179 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:01,180 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:01,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2850 [2021-05-22 02:27:01,385 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:01,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:01,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1629460481, now seen corresponding path program 378 times [2021-05-22 02:27:01,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:01,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826851536] [2021-05-22 02:27:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:01,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:01,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826851536] [2021-05-22 02:27:01,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826851536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:01,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68719207] [2021-05-22 02:27:01,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:01,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:27:01,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:01,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:01,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:01,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:01,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68719207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:01,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:01,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:27:01,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144832272] [2021-05-22 02:27:01,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:01,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:01,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:01,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:01,666 INFO L87 Difference]: Start difference. First operand 208 states and 464 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:02,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:02,126 INFO L93 Difference]: Finished difference Result 244 states and 534 transitions. [2021-05-22 02:27:02,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:27:02,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:02,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:02,127 INFO L225 Difference]: With dead ends: 244 [2021-05-22 02:27:02,127 INFO L226 Difference]: Without dead ends: 244 [2021-05-22 02:27:02,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 498.8ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:27:02,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-22 02:27:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 209. [2021-05-22 02:27:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2403846153846154) internal successors, (466), 208 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 466 transitions. [2021-05-22 02:27:02,129 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 466 transitions. Word has length 19 [2021-05-22 02:27:02,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:02,129 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 466 transitions. [2021-05-22 02:27:02,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 466 transitions. [2021-05-22 02:27:02,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:02,130 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:02,130 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:02,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2855,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:02,330 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:02,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:02,331 INFO L82 PathProgramCache]: Analyzing trace with hash -832724729, now seen corresponding path program 379 times [2021-05-22 02:27:02,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:02,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680823178] [2021-05-22 02:27:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:02,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:02,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:02,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680823178] [2021-05-22 02:27:02,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680823178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:02,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370647741] [2021-05-22 02:27:02,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:02,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:02,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:02,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370647741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:02,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:02,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:27:02,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803616217] [2021-05-22 02:27:02,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:02,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:02,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:02,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:02,593 INFO L87 Difference]: Start difference. First operand 209 states and 466 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:03,384 INFO L93 Difference]: Finished difference Result 277 states and 586 transitions. [2021-05-22 02:27:03,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:27:03,384 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:03,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:03,385 INFO L225 Difference]: With dead ends: 277 [2021-05-22 02:27:03,385 INFO L226 Difference]: Without dead ends: 277 [2021-05-22 02:27:03,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 798.8ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:27:03,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-05-22 02:27:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 210. [2021-05-22 02:27:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.248803827751196) internal successors, (470), 209 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 470 transitions. [2021-05-22 02:27:03,387 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 470 transitions. Word has length 19 [2021-05-22 02:27:03,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:03,387 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 470 transitions. [2021-05-22 02:27:03,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:03,387 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 470 transitions. [2021-05-22 02:27:03,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:03,387 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:03,387 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:03,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2860 [2021-05-22 02:27:03,588 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:03,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:03,588 INFO L82 PathProgramCache]: Analyzing trace with hash 294671364, now seen corresponding path program 380 times [2021-05-22 02:27:03,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:03,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370821200] [2021-05-22 02:27:03,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:03,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:03,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:03,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370821200] [2021-05-22 02:27:03,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370821200] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:03,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408434557] [2021-05-22 02:27:03,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:03,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:27:03,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:03,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:03,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:03,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408434557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:03,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:03,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:27:03,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594053678] [2021-05-22 02:27:03,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:03,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:03,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:03,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:03,913 INFO L87 Difference]: Start difference. First operand 210 states and 470 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:04,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:04,199 INFO L93 Difference]: Finished difference Result 227 states and 500 transitions. [2021-05-22 02:27:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:27:04,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:04,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:04,199 INFO L225 Difference]: With dead ends: 227 [2021-05-22 02:27:04,199 INFO L226 Difference]: Without dead ends: 225 [2021-05-22 02:27:04,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 404.4ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:27:04,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-22 02:27:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 206. [2021-05-22 02:27:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2439024390243905) internal successors, (460), 205 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 460 transitions. [2021-05-22 02:27:04,201 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 460 transitions. Word has length 19 [2021-05-22 02:27:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:04,201 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 460 transitions. [2021-05-22 02:27:04,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 460 transitions. [2021-05-22 02:27:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:04,202 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:04,202 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:04,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2867 [2021-05-22 02:27:04,409 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:04,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:04,409 INFO L82 PathProgramCache]: Analyzing trace with hash 708992161, now seen corresponding path program 381 times [2021-05-22 02:27:04,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:04,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608823236] [2021-05-22 02:27:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:04,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:04,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608823236] [2021-05-22 02:27:04,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608823236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:04,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194427303] [2021-05-22 02:27:04,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:04,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:27:04,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:04,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:04,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:04,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194427303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:04,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:04,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:04,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232007910] [2021-05-22 02:27:04,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:04,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:04,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:04,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:04,677 INFO L87 Difference]: Start difference. First operand 206 states and 460 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:04,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:04,896 INFO L93 Difference]: Finished difference Result 229 states and 505 transitions. [2021-05-22 02:27:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:27:04,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:04,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:04,897 INFO L225 Difference]: With dead ends: 229 [2021-05-22 02:27:04,897 INFO L226 Difference]: Without dead ends: 229 [2021-05-22 02:27:04,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:27:04,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-22 02:27:04,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 206. [2021-05-22 02:27:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2439024390243905) internal successors, (460), 205 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:04,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 460 transitions. [2021-05-22 02:27:04,899 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 460 transitions. Word has length 19 [2021-05-22 02:27:04,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:04,899 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 460 transitions. [2021-05-22 02:27:04,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:04,899 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 460 transitions. [2021-05-22 02:27:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:04,899 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:04,899 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:05,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:05,099 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:05,100 INFO L82 PathProgramCache]: Analyzing trace with hash -837134980, now seen corresponding path program 382 times [2021-05-22 02:27:05,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:05,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166899493] [2021-05-22 02:27:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:05,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:05,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166899493] [2021-05-22 02:27:05,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166899493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:05,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142282682] [2021-05-22 02:27:05,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:05,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:27:05,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:05,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:05,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:05,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142282682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:05,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:05,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:05,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453912393] [2021-05-22 02:27:05,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:05,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:05,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:05,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:05,394 INFO L87 Difference]: Start difference. First operand 206 states and 460 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:05,587 INFO L93 Difference]: Finished difference Result 212 states and 467 transitions. [2021-05-22 02:27:05,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:27:05,587 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:05,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:05,587 INFO L225 Difference]: With dead ends: 212 [2021-05-22 02:27:05,587 INFO L226 Difference]: Without dead ends: 206 [2021-05-22 02:27:05,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 339.1ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:27:05,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-22 02:27:05,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-05-22 02:27:05,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:05,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-05-22 02:27:05,589 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 19 [2021-05-22 02:27:05,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:05,589 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-05-22 02:27:05,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:05,589 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-05-22 02:27:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:05,590 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:05,590 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:05,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2880,383 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:05,790 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:05,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:05,790 INFO L82 PathProgramCache]: Analyzing trace with hash -362003303, now seen corresponding path program 383 times [2021-05-22 02:27:05,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:05,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257975677] [2021-05-22 02:27:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:05,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:05,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257975677] [2021-05-22 02:27:05,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257975677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:05,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845017802] [2021-05-22 02:27:05,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:05,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:27:05,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:05,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:05,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:06,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845017802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:06,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:06,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:06,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664978475] [2021-05-22 02:27:06,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:06,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:06,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:06,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:06,064 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:06,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:06,451 INFO L93 Difference]: Finished difference Result 239 states and 525 transitions. [2021-05-22 02:27:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:06,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:06,451 INFO L225 Difference]: With dead ends: 239 [2021-05-22 02:27:06,451 INFO L226 Difference]: Without dead ends: 239 [2021-05-22 02:27:06,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 461.6ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:27:06,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-22 02:27:06,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 207. [2021-05-22 02:27:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.237864077669903) internal successors, (461), 206 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:06,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 461 transitions. [2021-05-22 02:27:06,453 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 461 transitions. Word has length 19 [2021-05-22 02:27:06,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:06,453 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 461 transitions. [2021-05-22 02:27:06,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 461 transitions. [2021-05-22 02:27:06,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:06,453 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:06,454 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:06,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2887,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:06,654 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:06,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:06,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1562128542, now seen corresponding path program 384 times [2021-05-22 02:27:06,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:06,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729858870] [2021-05-22 02:27:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:06,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:06,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729858870] [2021-05-22 02:27:06,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729858870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:06,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210966406] [2021-05-22 02:27:06,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:06,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:27:06,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:06,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:06,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:06,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:06,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210966406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:06,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:06,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:06,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508715424] [2021-05-22 02:27:06,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:06,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:06,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:06,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:06,979 INFO L87 Difference]: Start difference. First operand 207 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:07,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:07,177 INFO L93 Difference]: Finished difference Result 220 states and 487 transitions. [2021-05-22 02:27:07,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:27:07,177 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:07,177 INFO L225 Difference]: With dead ends: 220 [2021-05-22 02:27:07,177 INFO L226 Difference]: Without dead ends: 220 [2021-05-22 02:27:07,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:27:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-22 02:27:07,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 208. [2021-05-22 02:27:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-05-22 02:27:07,179 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-05-22 02:27:07,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:07,179 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-05-22 02:27:07,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:07,179 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-05-22 02:27:07,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:07,179 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:07,180 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:07,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2892 [2021-05-22 02:27:07,380 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:07,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:07,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1845138241, now seen corresponding path program 385 times [2021-05-22 02:27:07,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:07,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065627154] [2021-05-22 02:27:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:07,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:07,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065627154] [2021-05-22 02:27:07,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065627154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:07,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052267062] [2021-05-22 02:27:07,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:07,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:27:07,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:07,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052267062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:07,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:07,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:07,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106321650] [2021-05-22 02:27:07,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:07,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:07,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:07,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:07,707 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:07,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:07,954 INFO L93 Difference]: Finished difference Result 229 states and 505 transitions. [2021-05-22 02:27:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:07,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:07,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:07,955 INFO L225 Difference]: With dead ends: 229 [2021-05-22 02:27:07,955 INFO L226 Difference]: Without dead ends: 229 [2021-05-22 02:27:07,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:27:07,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-22 02:27:07,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 208. [2021-05-22 02:27:07,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-05-22 02:27:07,957 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-05-22 02:27:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:07,957 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-05-22 02:27:07,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-05-22 02:27:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:07,957 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:07,957 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:08,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2900,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:08,158 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:08,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:08,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1048402489, now seen corresponding path program 386 times [2021-05-22 02:27:08,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:08,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133223124] [2021-05-22 02:27:08,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:08,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:08,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133223124] [2021-05-22 02:27:08,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133223124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:08,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215265348] [2021-05-22 02:27:08,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:08,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:27:08,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:08,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:08,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:08,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215265348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:08,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:08,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:08,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695852552] [2021-05-22 02:27:08,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:08,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:08,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:08,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:08,445 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:08,732 INFO L93 Difference]: Finished difference Result 236 states and 519 transitions. [2021-05-22 02:27:08,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:27:08,733 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:08,733 INFO L225 Difference]: With dead ends: 236 [2021-05-22 02:27:08,733 INFO L226 Difference]: Without dead ends: 236 [2021-05-22 02:27:08,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:27:08,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-22 02:27:08,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-05-22 02:27:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.236714975845411) internal successors, (463), 207 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 463 transitions. [2021-05-22 02:27:08,735 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 463 transitions. Word has length 19 [2021-05-22 02:27:08,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:08,735 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 463 transitions. [2021-05-22 02:27:08,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 463 transitions. [2021-05-22 02:27:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:08,735 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:08,736 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:08,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2908 [2021-05-22 02:27:08,936 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:08,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:08,936 INFO L82 PathProgramCache]: Analyzing trace with hash -760852254, now seen corresponding path program 387 times [2021-05-22 02:27:08,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:08,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176743545] [2021-05-22 02:27:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:09,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:09,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:09,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176743545] [2021-05-22 02:27:09,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176743545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:09,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648534719] [2021-05-22 02:27:09,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:09,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:27:09,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:09,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:09,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:09,264 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:09,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648534719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:09,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:09,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:09,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058316604] [2021-05-22 02:27:09,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:09,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:09,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:09,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:09,265 INFO L87 Difference]: Start difference. First operand 208 states and 463 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:09,447 INFO L93 Difference]: Finished difference Result 219 states and 483 transitions. [2021-05-22 02:27:09,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:27:09,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:09,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:09,448 INFO L225 Difference]: With dead ends: 219 [2021-05-22 02:27:09,448 INFO L226 Difference]: Without dead ends: 219 [2021-05-22 02:27:09,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:27:09,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-22 02:27:09,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 205. [2021-05-22 02:27:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.230392156862745) internal successors, (455), 204 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:09,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 455 transitions. [2021-05-22 02:27:09,450 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 455 transitions. Word has length 19 [2021-05-22 02:27:09,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:09,450 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 455 transitions. [2021-05-22 02:27:09,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 455 transitions. [2021-05-22 02:27:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:09,450 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:09,450 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:09,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2915,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:09,651 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:09,651 INFO L82 PathProgramCache]: Analyzing trace with hash 585339870, now seen corresponding path program 388 times [2021-05-22 02:27:09,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:09,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411762918] [2021-05-22 02:27:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:09,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:09,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411762918] [2021-05-22 02:27:09,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411762918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:09,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196752367] [2021-05-22 02:27:09,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:09,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:27:09,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:09,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:09,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:09,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196752367] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:09,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:09,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:09,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697921869] [2021-05-22 02:27:09,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:09,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:09,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:09,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:09,936 INFO L87 Difference]: Start difference. First operand 205 states and 455 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:10,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:10,197 INFO L93 Difference]: Finished difference Result 297 states and 613 transitions. [2021-05-22 02:27:10,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:27:10,197 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:10,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:10,197 INFO L225 Difference]: With dead ends: 297 [2021-05-22 02:27:10,197 INFO L226 Difference]: Without dead ends: 297 [2021-05-22 02:27:10,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 327.3ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:27:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-22 02:27:10,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 207. [2021-05-22 02:27:10,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.2427184466019416) internal successors, (462), 206 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 462 transitions. [2021-05-22 02:27:10,199 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 462 transitions. Word has length 19 [2021-05-22 02:27:10,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:10,199 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 462 transitions. [2021-05-22 02:27:10,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:10,199 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 462 transitions. [2021-05-22 02:27:10,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:10,200 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:10,200 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:10,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2923,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:10,400 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:10,400 INFO L82 PathProgramCache]: Analyzing trace with hash 2080425983, now seen corresponding path program 389 times [2021-05-22 02:27:10,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:10,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207230546] [2021-05-22 02:27:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:10,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:10,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207230546] [2021-05-22 02:27:10,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207230546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:10,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164440410] [2021-05-22 02:27:10,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:10,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:27:10,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:10,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:10,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:10,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164440410] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:10,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:10,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:10,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133673782] [2021-05-22 02:27:10,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:10,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:10,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:10,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:10,767 INFO L87 Difference]: Start difference. First operand 207 states and 462 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:10,932 INFO L93 Difference]: Finished difference Result 237 states and 509 transitions. [2021-05-22 02:27:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:10,932 INFO L225 Difference]: With dead ends: 237 [2021-05-22 02:27:10,932 INFO L226 Difference]: Without dead ends: 231 [2021-05-22 02:27:10,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 345.1ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:27:10,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-22 02:27:10,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 215. [2021-05-22 02:27:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2289719626168223) internal successors, (477), 214 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:10,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 477 transitions. [2021-05-22 02:27:10,934 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 477 transitions. Word has length 19 [2021-05-22 02:27:10,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:10,934 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 477 transitions. [2021-05-22 02:27:10,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 477 transitions. [2021-05-22 02:27:10,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:10,935 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:10,935 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:11,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2930 [2021-05-22 02:27:11,135 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:11,136 INFO L82 PathProgramCache]: Analyzing trace with hash 47484292, now seen corresponding path program 390 times [2021-05-22 02:27:11,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:11,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453052017] [2021-05-22 02:27:11,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:11,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:11,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453052017] [2021-05-22 02:27:11,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453052017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:11,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395930628] [2021-05-22 02:27:11,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:11,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:27:11,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:11,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:11,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:11,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395930628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:11,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:11,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:11,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347138783] [2021-05-22 02:27:11,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:11,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:11,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:11,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:11,427 INFO L87 Difference]: Start difference. First operand 215 states and 477 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:11,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:11,542 INFO L93 Difference]: Finished difference Result 241 states and 526 transitions. [2021-05-22 02:27:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:27:11,542 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:11,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:11,542 INFO L225 Difference]: With dead ends: 241 [2021-05-22 02:27:11,542 INFO L226 Difference]: Without dead ends: 241 [2021-05-22 02:27:11,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:11,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-22 02:27:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 213. [2021-05-22 02:27:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2169811320754715) internal successors, (470), 212 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:11,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-05-22 02:27:11,544 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-05-22 02:27:11,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:11,544 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-05-22 02:27:11,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:11,544 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-05-22 02:27:11,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:11,544 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:11,545 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:11,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2938,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:11,745 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:11,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:11,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1345459015, now seen corresponding path program 391 times [2021-05-22 02:27:11,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:11,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448403193] [2021-05-22 02:27:11,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:11,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:11,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448403193] [2021-05-22 02:27:11,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448403193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:11,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333410243] [2021-05-22 02:27:11,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:11,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:11,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:12,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333410243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:12,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:12,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:12,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569968333] [2021-05-22 02:27:12,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:12,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:12,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:12,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:12,019 INFO L87 Difference]: Start difference. First operand 213 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:12,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:12,211 INFO L93 Difference]: Finished difference Result 234 states and 512 transitions. [2021-05-22 02:27:12,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:27:12,211 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:12,211 INFO L225 Difference]: With dead ends: 234 [2021-05-22 02:27:12,211 INFO L226 Difference]: Without dead ends: 234 [2021-05-22 02:27:12,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:27:12,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-22 02:27:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 213. [2021-05-22 02:27:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2169811320754715) internal successors, (470), 212 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-05-22 02:27:12,213 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-05-22 02:27:12,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:12,213 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-05-22 02:27:12,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:12,213 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-05-22 02:27:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:12,214 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:12,214 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:12,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2943 [2021-05-22 02:27:12,414 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:12,414 INFO L82 PathProgramCache]: Analyzing trace with hash 274463551, now seen corresponding path program 392 times [2021-05-22 02:27:12,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:12,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90418937] [2021-05-22 02:27:12,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:12,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:12,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90418937] [2021-05-22 02:27:12,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90418937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:12,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513035362] [2021-05-22 02:27:12,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:12,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:27:12,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:12,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:12,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:12,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513035362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:12,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:12,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:12,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573997560] [2021-05-22 02:27:12,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:12,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:12,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:12,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:12,700 INFO L87 Difference]: Start difference. First operand 213 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:13,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:13,104 INFO L93 Difference]: Finished difference Result 246 states and 536 transitions. [2021-05-22 02:27:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:13,104 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:13,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:13,104 INFO L225 Difference]: With dead ends: 246 [2021-05-22 02:27:13,104 INFO L226 Difference]: Without dead ends: 246 [2021-05-22 02:27:13,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 450.8ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:27:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-22 02:27:13,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 214. [2021-05-22 02:27:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.215962441314554) internal successors, (472), 213 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 472 transitions. [2021-05-22 02:27:13,106 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 472 transitions. Word has length 19 [2021-05-22 02:27:13,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:13,106 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 472 transitions. [2021-05-22 02:27:13,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:13,106 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 472 transitions. [2021-05-22 02:27:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:13,107 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:13,107 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:13,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2948,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:13,307 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:13,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:13,307 INFO L82 PathProgramCache]: Analyzing trace with hash -2096371900, now seen corresponding path program 393 times [2021-05-22 02:27:13,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:13,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743582267] [2021-05-22 02:27:13,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:13,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:13,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743582267] [2021-05-22 02:27:13,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743582267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:13,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985021383] [2021-05-22 02:27:13,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:13,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:27:13,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:13,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:27:13,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:13,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985021383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:13,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:13,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:13,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174456802] [2021-05-22 02:27:13,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:13,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:13,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:13,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:13,641 INFO L87 Difference]: Start difference. First operand 214 states and 472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:13,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:13,872 INFO L93 Difference]: Finished difference Result 227 states and 498 transitions. [2021-05-22 02:27:13,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:27:13,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:13,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:13,873 INFO L225 Difference]: With dead ends: 227 [2021-05-22 02:27:13,873 INFO L226 Difference]: Without dead ends: 227 [2021-05-22 02:27:13,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 361.4ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:27:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-22 02:27:13,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2021-05-22 02:27:13,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-05-22 02:27:13,875 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-05-22 02:27:13,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:13,875 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-05-22 02:27:13,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-05-22 02:27:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:13,875 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:13,875 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:14,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2953 [2021-05-22 02:27:14,076 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:14,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:14,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1208671387, now seen corresponding path program 394 times [2021-05-22 02:27:14,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:14,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411829062] [2021-05-22 02:27:14,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:14,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:14,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411829062] [2021-05-22 02:27:14,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411829062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:14,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367729471] [2021-05-22 02:27:14,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:14,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:27:14,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:14,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:14,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:14,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367729471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:14,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:14,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:14,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687867615] [2021-05-22 02:27:14,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:14,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:14,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:14,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:14,378 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:14,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:14,573 INFO L93 Difference]: Finished difference Result 235 states and 514 transitions. [2021-05-22 02:27:14,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:27:14,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:14,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:14,574 INFO L225 Difference]: With dead ends: 235 [2021-05-22 02:27:14,574 INFO L226 Difference]: Without dead ends: 235 [2021-05-22 02:27:14,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 310.6ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:27:14,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-22 02:27:14,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 213. [2021-05-22 02:27:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.2169811320754715) internal successors, (470), 212 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 470 transitions. [2021-05-22 02:27:14,576 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 470 transitions. Word has length 19 [2021-05-22 02:27:14,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:14,576 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 470 transitions. [2021-05-22 02:27:14,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:14,576 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 470 transitions. [2021-05-22 02:27:14,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:14,576 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:14,576 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:14,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2962,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:14,777 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:14,777 INFO L82 PathProgramCache]: Analyzing trace with hash -411935635, now seen corresponding path program 395 times [2021-05-22 02:27:14,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:14,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283954750] [2021-05-22 02:27:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:14,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:14,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283954750] [2021-05-22 02:27:14,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283954750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:14,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621174354] [2021-05-22 02:27:14,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:14,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:27:14,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:14,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:14,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:15,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621174354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:15,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:15,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:15,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647612520] [2021-05-22 02:27:15,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:15,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:15,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:15,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:15,093 INFO L87 Difference]: Start difference. First operand 213 states and 470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:15,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:15,409 INFO L93 Difference]: Finished difference Result 248 states and 540 transitions. [2021-05-22 02:27:15,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:27:15,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:15,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:15,410 INFO L225 Difference]: With dead ends: 248 [2021-05-22 02:27:15,410 INFO L226 Difference]: Without dead ends: 248 [2021-05-22 02:27:15,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 421.9ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:27:15,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-22 02:27:15,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 214. [2021-05-22 02:27:15,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.215962441314554) internal successors, (472), 213 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:15,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 472 transitions. [2021-05-22 02:27:15,412 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 472 transitions. Word has length 19 [2021-05-22 02:27:15,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:15,412 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 472 transitions. [2021-05-22 02:27:15,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:15,412 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 472 transitions. [2021-05-22 02:27:15,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:15,412 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:15,412 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:15,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2967,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:15,612 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:15,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:15,613 INFO L82 PathProgramCache]: Analyzing trace with hash -124385400, now seen corresponding path program 396 times [2021-05-22 02:27:15,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:15,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171395396] [2021-05-22 02:27:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:15,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:15,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171395396] [2021-05-22 02:27:15,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171395396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:15,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270867051] [2021-05-22 02:27:15,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:15,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:27:15,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:15,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:15,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:15,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270867051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:15,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:15,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:15,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537337954] [2021-05-22 02:27:15,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:15,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:15,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:15,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:15,942 INFO L87 Difference]: Start difference. First operand 214 states and 472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:16,160 INFO L93 Difference]: Finished difference Result 228 states and 502 transitions. [2021-05-22 02:27:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:27:16,160 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:16,161 INFO L225 Difference]: With dead ends: 228 [2021-05-22 02:27:16,161 INFO L226 Difference]: Without dead ends: 228 [2021-05-22 02:27:16,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:27:16,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-22 02:27:16,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 212. [2021-05-22 02:27:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:16,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-05-22 02:27:16,163 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-05-22 02:27:16,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:16,163 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-05-22 02:27:16,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:16,163 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-05-22 02:27:16,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:16,163 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:16,163 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:16,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2974 [2021-05-22 02:27:16,364 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:16,364 INFO L82 PathProgramCache]: Analyzing trace with hash -745435227, now seen corresponding path program 397 times [2021-05-22 02:27:16,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:16,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545822390] [2021-05-22 02:27:16,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:16,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:16,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:16,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545822390] [2021-05-22 02:27:16,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545822390] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:16,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626456527] [2021-05-22 02:27:16,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:16,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:16,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:16,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626456527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:16,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:16,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:16,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399154606] [2021-05-22 02:27:16,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:16,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:16,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:16,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:16,716 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:16,995 INFO L93 Difference]: Finished difference Result 240 states and 513 transitions. [2021-05-22 02:27:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:27:16,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:16,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:16,996 INFO L225 Difference]: With dead ends: 240 [2021-05-22 02:27:16,996 INFO L226 Difference]: Without dead ends: 240 [2021-05-22 02:27:16,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 389.6ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:27:16,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-22 02:27:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 213. [2021-05-22 02:27:16,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.202830188679245) internal successors, (467), 212 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 467 transitions. [2021-05-22 02:27:16,998 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 467 transitions. Word has length 19 [2021-05-22 02:27:16,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:16,998 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 467 transitions. [2021-05-22 02:27:16,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 467 transitions. [2021-05-22 02:27:16,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:16,998 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:16,998 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:17,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2982 [2021-05-22 02:27:17,199 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:17,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1221806724, now seen corresponding path program 398 times [2021-05-22 02:27:17,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:17,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749785715] [2021-05-22 02:27:17,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:17,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:17,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749785715] [2021-05-22 02:27:17,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749785715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:17,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582427766] [2021-05-22 02:27:17,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:17,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:27:17,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:17,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:17,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:17,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582427766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:17,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:17,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:17,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603644168] [2021-05-22 02:27:17,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:17,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:17,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:17,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:17,505 INFO L87 Difference]: Start difference. First operand 213 states and 467 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:17,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:17,679 INFO L93 Difference]: Finished difference Result 280 states and 590 transitions. [2021-05-22 02:27:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:17,680 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:17,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:17,680 INFO L225 Difference]: With dead ends: 280 [2021-05-22 02:27:17,680 INFO L226 Difference]: Without dead ends: 280 [2021-05-22 02:27:17,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 270.3ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:27:17,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-22 02:27:17,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 215. [2021-05-22 02:27:17,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2149532710280373) internal successors, (474), 214 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 474 transitions. [2021-05-22 02:27:17,682 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 474 transitions. Word has length 19 [2021-05-22 02:27:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:17,682 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 474 transitions. [2021-05-22 02:27:17,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 474 transitions. [2021-05-22 02:27:17,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:17,682 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:17,683 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:17,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2990,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:17,883 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:17,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1578074459, now seen corresponding path program 399 times [2021-05-22 02:27:17,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:17,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497219618] [2021-05-22 02:27:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:17,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:17,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497219618] [2021-05-22 02:27:17,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497219618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:17,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293857549] [2021-05-22 02:27:17,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:18,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:27:18,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:18,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:18,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:18,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293857549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:18,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:18,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:18,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554210918] [2021-05-22 02:27:18,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:18,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:18,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:18,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:18,241 INFO L87 Difference]: Start difference. First operand 215 states and 474 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:18,434 INFO L93 Difference]: Finished difference Result 225 states and 490 transitions. [2021-05-22 02:27:18,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:27:18,435 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:18,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:18,435 INFO L225 Difference]: With dead ends: 225 [2021-05-22 02:27:18,435 INFO L226 Difference]: Without dead ends: 219 [2021-05-22 02:27:18,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:27:18,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-22 02:27:18,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 212. [2021-05-22 02:27:18,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2180094786729856) internal successors, (468), 211 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:18,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 468 transitions. [2021-05-22 02:27:18,437 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 468 transitions. Word has length 19 [2021-05-22 02:27:18,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:18,437 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 468 transitions. [2021-05-22 02:27:18,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:18,437 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 468 transitions. [2021-05-22 02:27:18,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:18,437 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:18,437 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:18,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2997 [2021-05-22 02:27:18,637 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:18,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:18,638 INFO L82 PathProgramCache]: Analyzing trace with hash 683951146, now seen corresponding path program 400 times [2021-05-22 02:27:18,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:18,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060778464] [2021-05-22 02:27:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:18,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:18,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060778464] [2021-05-22 02:27:18,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060778464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:18,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061266750] [2021-05-22 02:27:18,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:18,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:27:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:18,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:18,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:18,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061266750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:18,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:18,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:18,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342870761] [2021-05-22 02:27:18,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:18,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:18,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:18,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:18,937 INFO L87 Difference]: Start difference. First operand 212 states and 468 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:19,073 INFO L93 Difference]: Finished difference Result 238 states and 517 transitions. [2021-05-22 02:27:19,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:27:19,074 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:19,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:19,074 INFO L225 Difference]: With dead ends: 238 [2021-05-22 02:27:19,074 INFO L226 Difference]: Without dead ends: 238 [2021-05-22 02:27:19,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:19,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-22 02:27:19,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 208. [2021-05-22 02:27:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.207729468599034) internal successors, (457), 207 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 457 transitions. [2021-05-22 02:27:19,076 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 457 transitions. Word has length 19 [2021-05-22 02:27:19,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:19,076 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 457 transitions. [2021-05-22 02:27:19,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,076 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 457 transitions. [2021-05-22 02:27:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:19,076 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:19,076 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:19,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3005,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:19,277 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:19,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:19,277 INFO L82 PathProgramCache]: Analyzing trace with hash 58785791, now seen corresponding path program 401 times [2021-05-22 02:27:19,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:19,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082601041] [2021-05-22 02:27:19,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:19,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:19,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082601041] [2021-05-22 02:27:19,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082601041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:19,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084485098] [2021-05-22 02:27:19,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:19,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:27:19,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:19,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:27:19,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:19,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084485098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:19,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:19,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:19,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450179857] [2021-05-22 02:27:19,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:19,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:19,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:19,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:19,627 INFO L87 Difference]: Start difference. First operand 208 states and 457 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:19,809 INFO L93 Difference]: Finished difference Result 236 states and 513 transitions. [2021-05-22 02:27:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:27:19,809 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:19,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:19,809 INFO L225 Difference]: With dead ends: 236 [2021-05-22 02:27:19,809 INFO L226 Difference]: Without dead ends: 236 [2021-05-22 02:27:19,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:27:19,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-22 02:27:19,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 208. [2021-05-22 02:27:19,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.207729468599034) internal successors, (457), 207 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 457 transitions. [2021-05-22 02:27:19,811 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 457 transitions. Word has length 19 [2021-05-22 02:27:19,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:19,811 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 457 transitions. [2021-05-22 02:27:19,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:19,812 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 457 transitions. [2021-05-22 02:27:19,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:19,812 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:19,812 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:20,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3010 [2021-05-22 02:27:20,012 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:20,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:20,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1982917636, now seen corresponding path program 402 times [2021-05-22 02:27:20,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:20,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348180975] [2021-05-22 02:27:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:20,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:20,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348180975] [2021-05-22 02:27:20,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348180975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:20,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060892329] [2021-05-22 02:27:20,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:20,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:27:20,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:20,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-22 02:27:20,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:20,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060892329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:20,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:20,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:27:20,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512211913] [2021-05-22 02:27:20,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:20,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:20,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:20,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:20,389 INFO L87 Difference]: Start difference. First operand 208 states and 457 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:20,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:20,959 INFO L93 Difference]: Finished difference Result 317 states and 654 transitions. [2021-05-22 02:27:20,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:27:20,959 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:20,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:20,959 INFO L225 Difference]: With dead ends: 317 [2021-05-22 02:27:20,959 INFO L226 Difference]: Without dead ends: 317 [2021-05-22 02:27:20,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 627.3ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:27:20,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-22 02:27:20,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 210. [2021-05-22 02:27:20,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.229665071770335) internal successors, (466), 209 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:20,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 466 transitions. [2021-05-22 02:27:20,962 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 466 transitions. Word has length 19 [2021-05-22 02:27:20,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:20,962 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 466 transitions. [2021-05-22 02:27:20,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:20,962 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 466 transitions. [2021-05-22 02:27:20,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:20,962 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:20,962 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:21,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:21,162 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:21,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:21,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1154672572, now seen corresponding path program 403 times [2021-05-22 02:27:21,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:21,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639509374] [2021-05-22 02:27:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:21,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:21,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639509374] [2021-05-22 02:27:21,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639509374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:21,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987258437] [2021-05-22 02:27:21,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:21,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:27:21,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:21,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:21,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987258437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:21,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:21,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:21,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635098528] [2021-05-22 02:27:21,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:21,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:21,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:21,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:21,529 INFO L87 Difference]: Start difference. First operand 210 states and 466 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:21,902 INFO L93 Difference]: Finished difference Result 255 states and 545 transitions. [2021-05-22 02:27:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:27:21,902 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:21,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:21,902 INFO L225 Difference]: With dead ends: 255 [2021-05-22 02:27:21,902 INFO L226 Difference]: Without dead ends: 253 [2021-05-22 02:27:21,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 470.3ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:27:21,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-22 02:27:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2021-05-22 02:27:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.22488038277512) internal successors, (465), 209 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 465 transitions. [2021-05-22 02:27:21,904 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 465 transitions. Word has length 19 [2021-05-22 02:27:21,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:21,904 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 465 transitions. [2021-05-22 02:27:21,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:21,905 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 465 transitions. [2021-05-22 02:27:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:21,905 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:21,905 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:22,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3021 [2021-05-22 02:27:22,105 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:22,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:22,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1805703394, now seen corresponding path program 404 times [2021-05-22 02:27:22,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:22,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045438870] [2021-05-22 02:27:22,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:22,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:22,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045438870] [2021-05-22 02:27:22,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045438870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:22,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732675546] [2021-05-22 02:27:22,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:22,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:27:22,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:22,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:22,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:22,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732675546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:22,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:22,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:22,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485814734] [2021-05-22 02:27:22,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:22,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:22,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:22,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:22,413 INFO L87 Difference]: Start difference. First operand 210 states and 465 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:22,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:22,811 INFO L93 Difference]: Finished difference Result 265 states and 565 transitions. [2021-05-22 02:27:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:27:22,811 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:22,812 INFO L225 Difference]: With dead ends: 265 [2021-05-22 02:27:22,812 INFO L226 Difference]: Without dead ends: 265 [2021-05-22 02:27:22,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 445.8ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:27:22,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-22 02:27:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 209. [2021-05-22 02:27:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2163461538461537) internal successors, (461), 208 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 461 transitions. [2021-05-22 02:27:22,814 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 461 transitions. Word has length 19 [2021-05-22 02:27:22,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:22,814 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 461 transitions. [2021-05-22 02:27:22,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:22,814 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 461 transitions. [2021-05-22 02:27:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:22,814 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:22,814 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:23,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3028 [2021-05-22 02:27:23,015 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:23,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:23,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1951408324, now seen corresponding path program 405 times [2021-05-22 02:27:23,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:23,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211445041] [2021-05-22 02:27:23,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:23,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:23,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211445041] [2021-05-22 02:27:23,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211445041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:23,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229113279] [2021-05-22 02:27:23,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:23,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:27:23,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:23,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:23,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:23,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229113279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:23,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:23,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:23,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101788411] [2021-05-22 02:27:23,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:23,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:23,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:23,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:23,312 INFO L87 Difference]: Start difference. First operand 209 states and 461 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:23,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:23,533 INFO L93 Difference]: Finished difference Result 237 states and 514 transitions. [2021-05-22 02:27:23,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:23,533 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:23,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:23,533 INFO L225 Difference]: With dead ends: 237 [2021-05-22 02:27:23,533 INFO L226 Difference]: Without dead ends: 237 [2021-05-22 02:27:23,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:27:23,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-22 02:27:23,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 207. [2021-05-22 02:27:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.203883495145631) internal successors, (454), 206 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:23,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 454 transitions. [2021-05-22 02:27:23,535 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 454 transitions. Word has length 19 [2021-05-22 02:27:23,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:23,535 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 454 transitions. [2021-05-22 02:27:23,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:23,535 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 454 transitions. [2021-05-22 02:27:23,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:23,536 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:23,536 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:23,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:23,741 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:23,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1006128964, now seen corresponding path program 406 times [2021-05-22 02:27:23,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:23,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212447340] [2021-05-22 02:27:23,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:23,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:23,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212447340] [2021-05-22 02:27:23,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212447340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:23,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855432136] [2021-05-22 02:27:23,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:23,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:27:23,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:23,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:23,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:24,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855432136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:24,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:24,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:24,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111725264] [2021-05-22 02:27:24,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:24,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:24,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:24,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:24,035 INFO L87 Difference]: Start difference. First operand 207 states and 454 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:24,564 INFO L93 Difference]: Finished difference Result 294 states and 611 transitions. [2021-05-22 02:27:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:27:24,564 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:24,564 INFO L225 Difference]: With dead ends: 294 [2021-05-22 02:27:24,564 INFO L226 Difference]: Without dead ends: 294 [2021-05-22 02:27:24,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 538.5ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:27:24,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-22 02:27:24,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 209. [2021-05-22 02:27:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.2211538461538463) internal successors, (462), 208 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 462 transitions. [2021-05-22 02:27:24,567 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 462 transitions. Word has length 19 [2021-05-22 02:27:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:24,567 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 462 transitions. [2021-05-22 02:27:24,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:24,567 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 462 transitions. [2021-05-22 02:27:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:24,567 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:24,567 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:24,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3040 [2021-05-22 02:27:24,767 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:24,768 INFO L82 PathProgramCache]: Analyzing trace with hash 468273386, now seen corresponding path program 407 times [2021-05-22 02:27:24,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:24,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636100160] [2021-05-22 02:27:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:24,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:24,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636100160] [2021-05-22 02:27:24,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636100160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:24,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774119380] [2021-05-22 02:27:24,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:24,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:27:24,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:24,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:27:24,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:25,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774119380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:25,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:25,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:25,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610053146] [2021-05-22 02:27:25,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:25,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:25,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:25,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:25,067 INFO L87 Difference]: Start difference. First operand 209 states and 462 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:25,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:25,448 INFO L93 Difference]: Finished difference Result 247 states and 536 transitions. [2021-05-22 02:27:25,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:25,449 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:25,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:25,449 INFO L225 Difference]: With dead ends: 247 [2021-05-22 02:27:25,449 INFO L226 Difference]: Without dead ends: 247 [2021-05-22 02:27:25,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 422.5ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:27:25,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-22 02:27:25,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 208. [2021-05-22 02:27:25,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.2222222222222223) internal successors, (460), 207 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:25,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 460 transitions. [2021-05-22 02:27:25,451 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 460 transitions. Word has length 19 [2021-05-22 02:27:25,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:25,451 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 460 transitions. [2021-05-22 02:27:25,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:25,451 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 460 transitions. [2021-05-22 02:27:25,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:25,451 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:25,451 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:25,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3047,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:25,652 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:25,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:25,652 INFO L82 PathProgramCache]: Analyzing trace with hash 974619652, now seen corresponding path program 408 times [2021-05-22 02:27:25,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:25,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759981280] [2021-05-22 02:27:25,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:25,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:25,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759981280] [2021-05-22 02:27:25,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759981280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:25,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233984875] [2021-05-22 02:27:25,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:25,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:27:25,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:25,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:27:25,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:25,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233984875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:25,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:25,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:25,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450734794] [2021-05-22 02:27:25,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:25,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:25,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:25,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:25,972 INFO L87 Difference]: Start difference. First operand 208 states and 460 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:26,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:26,169 INFO L93 Difference]: Finished difference Result 241 states and 522 transitions. [2021-05-22 02:27:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:26,169 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:26,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:26,169 INFO L225 Difference]: With dead ends: 241 [2021-05-22 02:27:26,170 INFO L226 Difference]: Without dead ends: 241 [2021-05-22 02:27:26,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 242.6ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:26,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-22 02:27:26,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 205. [2021-05-22 02:27:26,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:26,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-05-22 02:27:26,171 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-05-22 02:27:26,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:26,172 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-05-22 02:27:26,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:26,172 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-05-22 02:27:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:26,172 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:26,172 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:26,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3052 [2021-05-22 02:27:26,372 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:26,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:26,373 INFO L82 PathProgramCache]: Analyzing trace with hash -398904991, now seen corresponding path program 409 times [2021-05-22 02:27:26,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:26,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423850648] [2021-05-22 02:27:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:26,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:26,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423850648] [2021-05-22 02:27:26,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423850648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:26,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017609494] [2021-05-22 02:27:26,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:26,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:26,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:26,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017609494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:26,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:26,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:26,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593297251] [2021-05-22 02:27:26,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:26,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:26,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:26,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:26,654 INFO L87 Difference]: Start difference. First operand 205 states and 450 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:26,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:26,883 INFO L93 Difference]: Finished difference Result 226 states and 492 transitions. [2021-05-22 02:27:26,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:26,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:26,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:26,884 INFO L225 Difference]: With dead ends: 226 [2021-05-22 02:27:26,884 INFO L226 Difference]: Without dead ends: 226 [2021-05-22 02:27:26,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:27:26,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-22 02:27:26,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 205. [2021-05-22 02:27:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-05-22 02:27:26,886 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-05-22 02:27:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:26,886 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-05-22 02:27:26,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-05-22 02:27:26,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:26,886 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:26,886 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:27,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3057,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:27,087 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:27,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:27,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1469900455, now seen corresponding path program 410 times [2021-05-22 02:27:27,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:27,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719468314] [2021-05-22 02:27:27,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:27,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:27,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719468314] [2021-05-22 02:27:27,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719468314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:27,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844266656] [2021-05-22 02:27:27,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:27,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:27:27,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:27,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:27:27,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:27,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844266656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:27,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:27,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:27,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298544928] [2021-05-22 02:27:27,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:27,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:27,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:27,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:27,384 INFO L87 Difference]: Start difference. First operand 205 states and 450 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:27,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:27,820 INFO L93 Difference]: Finished difference Result 239 states and 518 transitions. [2021-05-22 02:27:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:27:27,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:27,821 INFO L225 Difference]: With dead ends: 239 [2021-05-22 02:27:27,821 INFO L226 Difference]: Without dead ends: 239 [2021-05-22 02:27:27,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 461.3ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:27:27,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-22 02:27:27,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 205. [2021-05-22 02:27:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-05-22 02:27:27,823 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-05-22 02:27:27,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:27,823 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-05-22 02:27:27,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:27,823 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-05-22 02:27:27,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:27,823 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:27,823 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:28,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3062,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:28,024 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:28,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:28,024 INFO L82 PathProgramCache]: Analyzing trace with hash -673164703, now seen corresponding path program 411 times [2021-05-22 02:27:28,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:28,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323200772] [2021-05-22 02:27:28,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:28,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:28,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323200772] [2021-05-22 02:27:28,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323200772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:28,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739597569] [2021-05-22 02:27:28,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:28,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:27:28,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:28,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:28,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:28,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739597569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:28,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:28,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:28,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670946953] [2021-05-22 02:27:28,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:28,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:28,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:28,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:28,319 INFO L87 Difference]: Start difference. First operand 205 states and 450 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:28,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:28,796 INFO L93 Difference]: Finished difference Result 247 states and 534 transitions. [2021-05-22 02:27:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:27:28,796 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:28,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:28,796 INFO L225 Difference]: With dead ends: 247 [2021-05-22 02:27:28,796 INFO L226 Difference]: Without dead ends: 247 [2021-05-22 02:27:28,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 475.9ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:27:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-22 02:27:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 205. [2021-05-22 02:27:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.2058823529411766) internal successors, (450), 204 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:28,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 450 transitions. [2021-05-22 02:27:28,798 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 450 transitions. Word has length 19 [2021-05-22 02:27:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:28,798 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 450 transitions. [2021-05-22 02:27:28,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 450 transitions. [2021-05-22 02:27:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:28,799 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:28,799 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:28,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-05-22 02:27:28,999 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:28,999 INFO L82 PathProgramCache]: Analyzing trace with hash -385614468, now seen corresponding path program 412 times [2021-05-22 02:27:28,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:28,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196949521] [2021-05-22 02:27:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:29,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:29,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196949521] [2021-05-22 02:27:29,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196949521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:29,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282638988] [2021-05-22 02:27:29,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:29,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:27:29,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:29,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:29,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:29,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282638988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:29,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:29,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:29,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037640205] [2021-05-22 02:27:29,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:29,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:29,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:29,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:29,326 INFO L87 Difference]: Start difference. First operand 205 states and 450 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:29,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:29,541 INFO L93 Difference]: Finished difference Result 223 states and 485 transitions. [2021-05-22 02:27:29,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:29,541 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:29,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:29,541 INFO L225 Difference]: With dead ends: 223 [2021-05-22 02:27:29,542 INFO L226 Difference]: Without dead ends: 223 [2021-05-22 02:27:29,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:27:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-05-22 02:27:29,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 200. [2021-05-22 02:27:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.190954773869347) internal successors, (436), 199 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-05-22 02:27:29,543 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 19 [2021-05-22 02:27:29,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:29,544 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-05-22 02:27:29,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-05-22 02:27:29,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:29,544 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:29,544 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:29,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3074,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:29,744 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:29,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:29,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1341931903, now seen corresponding path program 413 times [2021-05-22 02:27:29,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:29,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659641010] [2021-05-22 02:27:29,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:29,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:29,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659641010] [2021-05-22 02:27:29,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659641010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:29,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919037765] [2021-05-22 02:27:29,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:29,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:27:29,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:29,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:29,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:30,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919037765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:30,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:30,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:30,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028106730] [2021-05-22 02:27:30,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:30,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:30,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:30,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:30,053 INFO L87 Difference]: Start difference. First operand 200 states and 436 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:30,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:30,256 INFO L93 Difference]: Finished difference Result 224 states and 484 transitions. [2021-05-22 02:27:30,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:27:30,256 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:30,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:30,257 INFO L225 Difference]: With dead ends: 224 [2021-05-22 02:27:30,257 INFO L226 Difference]: Without dead ends: 224 [2021-05-22 02:27:30,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:27:30,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-22 02:27:30,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 200. [2021-05-22 02:27:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.190954773869347) internal successors, (436), 199 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-05-22 02:27:30,258 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 19 [2021-05-22 02:27:30,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:30,258 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-05-22 02:27:30,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:30,259 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-05-22 02:27:30,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:30,259 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:30,259 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:30,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3082 [2021-05-22 02:27:30,459 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:30,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:30,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2138667655, now seen corresponding path program 414 times [2021-05-22 02:27:30,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:30,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241347517] [2021-05-22 02:27:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:30,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:30,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241347517] [2021-05-22 02:27:30,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241347517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:30,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962155907] [2021-05-22 02:27:30,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:30,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:27:30,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:30,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:27:30,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:30,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962155907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:30,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:30,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:30,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268213942] [2021-05-22 02:27:30,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:30,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:30,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:30,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:30,772 INFO L87 Difference]: Start difference. First operand 200 states and 436 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:31,097 INFO L93 Difference]: Finished difference Result 241 states and 518 transitions. [2021-05-22 02:27:31,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:27:31,098 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:31,098 INFO L225 Difference]: With dead ends: 241 [2021-05-22 02:27:31,098 INFO L226 Difference]: Without dead ends: 241 [2021-05-22 02:27:31,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 421.6ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:27:31,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-22 02:27:31,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 200. [2021-05-22 02:27:31,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.190954773869347) internal successors, (436), 199 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 436 transitions. [2021-05-22 02:27:31,100 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 436 transitions. Word has length 19 [2021-05-22 02:27:31,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:31,100 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 436 transitions. [2021-05-22 02:27:31,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:31,100 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 436 transitions. [2021-05-22 02:27:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:31,100 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:31,100 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:31,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-05-22 02:27:31,301 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:31,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:31,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1868749406, now seen corresponding path program 415 times [2021-05-22 02:27:31,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:31,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979639206] [2021-05-22 02:27:31,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:31,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:31,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979639206] [2021-05-22 02:27:31,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979639206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:31,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922087942] [2021-05-22 02:27:31,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:31,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:31,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:31,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922087942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:31,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:31,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:31,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953372061] [2021-05-22 02:27:31,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:31,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:31,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:31,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:31,630 INFO L87 Difference]: Start difference. First operand 200 states and 436 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:31,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:31,913 INFO L93 Difference]: Finished difference Result 221 states and 480 transitions. [2021-05-22 02:27:31,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:31,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:31,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:31,914 INFO L225 Difference]: With dead ends: 221 [2021-05-22 02:27:31,914 INFO L226 Difference]: Without dead ends: 221 [2021-05-22 02:27:31,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 374.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:27:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-22 02:27:31,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 198. [2021-05-22 02:27:31,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1928934010152283) internal successors, (432), 197 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:31,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 432 transitions. [2021-05-22 02:27:31,916 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 432 transitions. Word has length 19 [2021-05-22 02:27:31,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:31,916 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 432 transitions. [2021-05-22 02:27:31,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:31,916 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 432 transitions. [2021-05-22 02:27:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:31,916 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:31,916 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:32,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3094,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:32,116 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:32,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:32,117 INFO L82 PathProgramCache]: Analyzing trace with hash -522557282, now seen corresponding path program 416 times [2021-05-22 02:27:32,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:32,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156179403] [2021-05-22 02:27:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:32,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:32,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156179403] [2021-05-22 02:27:32,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156179403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:32,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028060122] [2021-05-22 02:27:32,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:32,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:27:32,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:32,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:32,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:32,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028060122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:32,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:32,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:32,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199299357] [2021-05-22 02:27:32,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:32,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:32,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:32,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:32,418 INFO L87 Difference]: Start difference. First operand 198 states and 432 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:32,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:32,694 INFO L93 Difference]: Finished difference Result 255 states and 541 transitions. [2021-05-22 02:27:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:27:32,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:32,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:32,695 INFO L225 Difference]: With dead ends: 255 [2021-05-22 02:27:32,695 INFO L226 Difference]: Without dead ends: 255 [2021-05-22 02:27:32,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 337.9ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:27:32,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-22 02:27:32,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-05-22 02:27:32,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.205) internal successors, (441), 200 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:32,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 441 transitions. [2021-05-22 02:27:32,697 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 441 transitions. Word has length 19 [2021-05-22 02:27:32,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:32,697 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 441 transitions. [2021-05-22 02:27:32,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:32,697 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 441 transitions. [2021-05-22 02:27:32,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:32,697 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:32,697 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:32,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3102,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:32,898 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:32,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:32,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1060412860, now seen corresponding path program 417 times [2021-05-22 02:27:32,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:32,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695051808] [2021-05-22 02:27:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:32,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:33,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:33,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695051808] [2021-05-22 02:27:33,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695051808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:33,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928908446] [2021-05-22 02:27:33,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:33,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:27:33,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:33,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-22 02:27:33,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:33,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928908446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:33,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:33,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:27:33,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441168486] [2021-05-22 02:27:33,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:33,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:33,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:33,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:33,209 INFO L87 Difference]: Start difference. First operand 201 states and 441 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:33,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:33,461 INFO L93 Difference]: Finished difference Result 234 states and 504 transitions. [2021-05-22 02:27:33,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:27:33,461 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:33,462 INFO L225 Difference]: With dead ends: 234 [2021-05-22 02:27:33,462 INFO L226 Difference]: Without dead ends: 234 [2021-05-22 02:27:33,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:27:33,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-22 02:27:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 196. [2021-05-22 02:27:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.194871794871795) internal successors, (428), 195 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 428 transitions. [2021-05-22 02:27:33,464 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 428 transitions. Word has length 19 [2021-05-22 02:27:33,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:33,464 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 428 transitions. [2021-05-22 02:27:33,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:33,464 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 428 transitions. [2021-05-22 02:27:33,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:33,464 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:33,464 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:33,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3109,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:33,665 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:33,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:33,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1685578215, now seen corresponding path program 418 times [2021-05-22 02:27:33,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:33,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919315378] [2021-05-22 02:27:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:33,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:33,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919315378] [2021-05-22 02:27:33,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919315378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:33,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133662327] [2021-05-22 02:27:33,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:33,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:27:33,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:33,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:33,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:33,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133662327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:33,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:33,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:33,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325807800] [2021-05-22 02:27:33,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:33,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:33,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:33,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:33,999 INFO L87 Difference]: Start difference. First operand 196 states and 428 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:34,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:34,191 INFO L93 Difference]: Finished difference Result 221 states and 478 transitions. [2021-05-22 02:27:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:34,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:34,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:34,191 INFO L225 Difference]: With dead ends: 221 [2021-05-22 02:27:34,191 INFO L226 Difference]: Without dead ends: 221 [2021-05-22 02:27:34,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:27:34,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-22 02:27:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 197. [2021-05-22 02:27:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.193877551020408) internal successors, (430), 196 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 430 transitions. [2021-05-22 02:27:34,193 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 430 transitions. Word has length 19 [2021-05-22 02:27:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:34,193 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 430 transitions. [2021-05-22 02:27:34,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 430 transitions. [2021-05-22 02:27:34,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:34,194 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:34,194 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:34,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3114 [2021-05-22 02:27:34,394 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:34,394 INFO L82 PathProgramCache]: Analyzing trace with hash -888842463, now seen corresponding path program 419 times [2021-05-22 02:27:34,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:34,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99050429] [2021-05-22 02:27:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:34,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:34,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99050429] [2021-05-22 02:27:34,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99050429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:34,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342991517] [2021-05-22 02:27:34,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:34,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:27:34,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:34,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:34,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:34,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342991517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:34,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:34,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:34,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216905939] [2021-05-22 02:27:34,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:34,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:34,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:34,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:34,700 INFO L87 Difference]: Start difference. First operand 197 states and 430 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:34,870 INFO L93 Difference]: Finished difference Result 240 states and 513 transitions. [2021-05-22 02:27:34,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:34,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:34,871 INFO L225 Difference]: With dead ends: 240 [2021-05-22 02:27:34,871 INFO L226 Difference]: Without dead ends: 237 [2021-05-22 02:27:34,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 254.4ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:27:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-22 02:27:34,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 198. [2021-05-22 02:27:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.197969543147208) internal successors, (433), 197 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 433 transitions. [2021-05-22 02:27:34,873 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 433 transitions. Word has length 19 [2021-05-22 02:27:34,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:34,873 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 433 transitions. [2021-05-22 02:27:34,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:34,873 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 433 transitions. [2021-05-22 02:27:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:34,873 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:34,873 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:35,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3119,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:35,074 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:35,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:35,074 INFO L82 PathProgramCache]: Analyzing trace with hash 238553630, now seen corresponding path program 420 times [2021-05-22 02:27:35,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:35,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245732675] [2021-05-22 02:27:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:35,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:35,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245732675] [2021-05-22 02:27:35,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245732675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:35,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509350012] [2021-05-22 02:27:35,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:35,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:27:35,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:35,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:35,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:35,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509350012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:35,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:35,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:35,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557886453] [2021-05-22 02:27:35,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:35,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:35,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:35,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:35,399 INFO L87 Difference]: Start difference. First operand 198 states and 433 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:35,578 INFO L93 Difference]: Finished difference Result 215 states and 464 transitions. [2021-05-22 02:27:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:35,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:35,579 INFO L225 Difference]: With dead ends: 215 [2021-05-22 02:27:35,579 INFO L226 Difference]: Without dead ends: 213 [2021-05-22 02:27:35,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:27:35,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-22 02:27:35,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2021-05-22 02:27:35,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.194871794871795) internal successors, (428), 195 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 428 transitions. [2021-05-22 02:27:35,581 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 428 transitions. Word has length 19 [2021-05-22 02:27:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:35,581 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 428 transitions. [2021-05-22 02:27:35,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 428 transitions. [2021-05-22 02:27:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:35,581 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:35,581 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:35,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3126,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:35,782 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:35,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:35,782 INFO L82 PathProgramCache]: Analyzing trace with hash -382496197, now seen corresponding path program 421 times [2021-05-22 02:27:35,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:35,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023911002] [2021-05-22 02:27:35,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:35,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:35,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023911002] [2021-05-22 02:27:35,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023911002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:35,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980314877] [2021-05-22 02:27:35,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:35,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:35,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:36,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980314877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:36,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:36,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:36,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222985878] [2021-05-22 02:27:36,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:36,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:36,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:36,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:36,136 INFO L87 Difference]: Start difference. First operand 196 states and 428 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:36,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:36,373 INFO L93 Difference]: Finished difference Result 210 states and 456 transitions. [2021-05-22 02:27:36,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:27:36,373 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:36,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:36,373 INFO L225 Difference]: With dead ends: 210 [2021-05-22 02:27:36,373 INFO L226 Difference]: Without dead ends: 210 [2021-05-22 02:27:36,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:27:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-22 02:27:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 198. [2021-05-22 02:27:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1928934010152283) internal successors, (432), 197 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:36,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 432 transitions. [2021-05-22 02:27:36,375 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 432 transitions. Word has length 19 [2021-05-22 02:27:36,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:36,375 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 432 transitions. [2021-05-22 02:27:36,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:36,375 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 432 transitions. [2021-05-22 02:27:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:36,376 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:36,376 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:36,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:36,586 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:36,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:36,586 INFO L82 PathProgramCache]: Analyzing trace with hash -94945962, now seen corresponding path program 422 times [2021-05-22 02:27:36,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:36,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961633513] [2021-05-22 02:27:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:36,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:36,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961633513] [2021-05-22 02:27:36,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961633513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:36,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745968606] [2021-05-22 02:27:36,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:36,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:27:36,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:36,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:36,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745968606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:36,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:36,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:36,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534376859] [2021-05-22 02:27:36,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:36,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:36,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:36,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:36,885 INFO L87 Difference]: Start difference. First operand 198 states and 432 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:37,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:37,206 INFO L93 Difference]: Finished difference Result 252 states and 536 transitions. [2021-05-22 02:27:37,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:37,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:37,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:37,207 INFO L225 Difference]: With dead ends: 252 [2021-05-22 02:27:37,207 INFO L226 Difference]: Without dead ends: 252 [2021-05-22 02:27:37,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 416.0ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:27:37,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-22 02:27:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 199. [2021-05-22 02:27:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.207070707070707) internal successors, (437), 198 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 437 transitions. [2021-05-22 02:27:37,209 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 437 transitions. Word has length 19 [2021-05-22 02:27:37,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:37,209 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 437 transitions. [2021-05-22 02:27:37,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 437 transitions. [2021-05-22 02:27:37,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:37,210 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:37,210 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:37,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3142 [2021-05-22 02:27:37,410 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:37,410 INFO L82 PathProgramCache]: Analyzing trace with hash 207044318, now seen corresponding path program 423 times [2021-05-22 02:27:37,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:37,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358242541] [2021-05-22 02:27:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:37,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:37,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358242541] [2021-05-22 02:27:37,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358242541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:37,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294696882] [2021-05-22 02:27:37,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:37,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:27:37,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:37,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:37,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:37,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:37,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294696882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:37,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:37,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:37,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048669869] [2021-05-22 02:27:37,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:37,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:37,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:37,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:37,724 INFO L87 Difference]: Start difference. First operand 199 states and 437 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:37,900 INFO L93 Difference]: Finished difference Result 227 states and 490 transitions. [2021-05-22 02:27:37,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:27:37,900 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:37,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:37,901 INFO L225 Difference]: With dead ends: 227 [2021-05-22 02:27:37,901 INFO L226 Difference]: Without dead ends: 227 [2021-05-22 02:27:37,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:27:37,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-22 02:27:37,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 195. [2021-05-22 02:27:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.195876288659794) internal successors, (426), 194 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 426 transitions. [2021-05-22 02:27:37,903 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 426 transitions. Word has length 19 [2021-05-22 02:27:37,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:37,903 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 426 transitions. [2021-05-22 02:27:37,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:37,903 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 426 transitions. [2021-05-22 02:27:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:37,903 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:37,903 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:38,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3149,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:38,104 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:38,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1865631135, now seen corresponding path program 424 times [2021-05-22 02:27:38,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:38,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652035883] [2021-05-22 02:27:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:38,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:38,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652035883] [2021-05-22 02:27:38,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652035883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:38,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404328364] [2021-05-22 02:27:38,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:38,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:27:38,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:38,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:38,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:38,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404328364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:38,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:38,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:38,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989082065] [2021-05-22 02:27:38,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:38,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:38,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:38,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:38,445 INFO L87 Difference]: Start difference. First operand 195 states and 426 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:38,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:38,678 INFO L93 Difference]: Finished difference Result 214 states and 462 transitions. [2021-05-22 02:27:38,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:27:38,678 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:38,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:38,679 INFO L225 Difference]: With dead ends: 214 [2021-05-22 02:27:38,679 INFO L226 Difference]: Without dead ends: 214 [2021-05-22 02:27:38,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 361.3ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:27:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-22 02:27:38,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 196. [2021-05-22 02:27:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1794871794871793) internal successors, (425), 195 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:38,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 425 transitions. [2021-05-22 02:27:38,680 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 425 transitions. Word has length 19 [2021-05-22 02:27:38,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:38,681 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 425 transitions. [2021-05-22 02:27:38,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 425 transitions. [2021-05-22 02:27:38,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:38,681 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:38,681 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:38,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3154 [2021-05-22 02:27:38,881 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:38,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1578080900, now seen corresponding path program 425 times [2021-05-22 02:27:38,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:38,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278015225] [2021-05-22 02:27:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:38,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:38,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278015225] [2021-05-22 02:27:38,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278015225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:38,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109863736] [2021-05-22 02:27:38,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:39,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:27:39,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:39,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:39,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:39,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109863736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:39,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:39,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:39,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008419298] [2021-05-22 02:27:39,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:39,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:39,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:39,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:39,172 INFO L87 Difference]: Start difference. First operand 196 states and 425 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:39,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:39,593 INFO L93 Difference]: Finished difference Result 263 states and 555 transitions. [2021-05-22 02:27:39,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:27:39,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:39,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:39,593 INFO L225 Difference]: With dead ends: 263 [2021-05-22 02:27:39,594 INFO L226 Difference]: Without dead ends: 263 [2021-05-22 02:27:39,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 500.6ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:27:39,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-05-22 02:27:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 198. [2021-05-22 02:27:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.197969543147208) internal successors, (433), 197 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 433 transitions. [2021-05-22 02:27:39,596 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 433 transitions. Word has length 19 [2021-05-22 02:27:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:39,596 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 433 transitions. [2021-05-22 02:27:39,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 433 transitions. [2021-05-22 02:27:39,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:39,596 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:39,596 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:39,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3162,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:39,796 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:39,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:39,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1276090620, now seen corresponding path program 426 times [2021-05-22 02:27:39,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:39,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497484788] [2021-05-22 02:27:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:39,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:39,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497484788] [2021-05-22 02:27:39,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497484788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:39,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674730117] [2021-05-22 02:27:39,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:39,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:27:39,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:39,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:39,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:40,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674730117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:40,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:40,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:40,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238801146] [2021-05-22 02:27:40,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:40,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:40,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:40,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:40,075 INFO L87 Difference]: Start difference. First operand 198 states and 433 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:40,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:40,428 INFO L93 Difference]: Finished difference Result 236 states and 507 transitions. [2021-05-22 02:27:40,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:27:40,428 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:40,428 INFO L225 Difference]: With dead ends: 236 [2021-05-22 02:27:40,428 INFO L226 Difference]: Without dead ends: 236 [2021-05-22 02:27:40,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:27:40,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-22 02:27:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 197. [2021-05-22 02:27:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.1989795918367347) internal successors, (431), 196 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 431 transitions. [2021-05-22 02:27:40,430 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 431 transitions. Word has length 19 [2021-05-22 02:27:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:40,430 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 431 transitions. [2021-05-22 02:27:40,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 431 transitions. [2021-05-22 02:27:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:40,430 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:40,430 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:40,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3169,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:40,631 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:40,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:40,631 INFO L82 PathProgramCache]: Analyzing trace with hash -769744354, now seen corresponding path program 427 times [2021-05-22 02:27:40,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:40,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671040082] [2021-05-22 02:27:40,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:40,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:40,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:40,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:40,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671040082] [2021-05-22 02:27:40,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671040082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:40,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755779582] [2021-05-22 02:27:40,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:40,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:40,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:40,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755779582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:40,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:40,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:40,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689367514] [2021-05-22 02:27:40,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:40,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:40,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:40,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:40,904 INFO L87 Difference]: Start difference. First operand 197 states and 431 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:41,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:41,044 INFO L93 Difference]: Finished difference Result 230 states and 493 transitions. [2021-05-22 02:27:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:27:41,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:41,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:41,044 INFO L225 Difference]: With dead ends: 230 [2021-05-22 02:27:41,044 INFO L226 Difference]: Without dead ends: 230 [2021-05-22 02:27:41,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:41,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-22 02:27:41,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 191. [2021-05-22 02:27:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:41,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-05-22 02:27:41,046 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 19 [2021-05-22 02:27:41,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:41,046 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-05-22 02:27:41,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:41,046 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-05-22 02:27:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:41,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:41,047 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:41,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3174,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:41,247 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:41,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:41,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1049111361, now seen corresponding path program 428 times [2021-05-22 02:27:41,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:41,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753515709] [2021-05-22 02:27:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:41,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:41,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753515709] [2021-05-22 02:27:41,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753515709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:41,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644651437] [2021-05-22 02:27:41,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:41,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:27:41,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:41,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:27:41,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:41,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644651437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:41,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:41,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:41,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887750153] [2021-05-22 02:27:41,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:41,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:41,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:41,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:41,552 INFO L87 Difference]: Start difference. First operand 191 states and 415 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:41,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:41,730 INFO L93 Difference]: Finished difference Result 217 states and 467 transitions. [2021-05-22 02:27:41,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:27:41,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:41,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:41,731 INFO L225 Difference]: With dead ends: 217 [2021-05-22 02:27:41,731 INFO L226 Difference]: Without dead ends: 217 [2021-05-22 02:27:41,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:27:41,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-22 02:27:41,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 192. [2021-05-22 02:27:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.183246073298429) internal successors, (417), 191 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:41,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 417 transitions. [2021-05-22 02:27:41,733 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 417 transitions. Word has length 19 [2021-05-22 02:27:41,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:41,733 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 417 transitions. [2021-05-22 02:27:41,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 417 transitions. [2021-05-22 02:27:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:41,733 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:41,733 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:41,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3179,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:41,934 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:41,934 INFO L82 PathProgramCache]: Analyzing trace with hash -252375609, now seen corresponding path program 429 times [2021-05-22 02:27:41,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:41,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383847078] [2021-05-22 02:27:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:42,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:42,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383847078] [2021-05-22 02:27:42,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383847078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:42,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454569585] [2021-05-22 02:27:42,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:42,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:27:42,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:42,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-22 02:27:42,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:42,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454569585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:42,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:42,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:27:42,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408217931] [2021-05-22 02:27:42,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:42,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:42,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:42,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:42,252 INFO L87 Difference]: Start difference. First operand 192 states and 417 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:42,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:42,439 INFO L93 Difference]: Finished difference Result 236 states and 502 transitions. [2021-05-22 02:27:42,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:27:42,440 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:42,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:42,440 INFO L225 Difference]: With dead ends: 236 [2021-05-22 02:27:42,440 INFO L226 Difference]: Without dead ends: 233 [2021-05-22 02:27:42,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:27:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-22 02:27:42,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 193. [2021-05-22 02:27:42,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1875) internal successors, (420), 192 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 420 transitions. [2021-05-22 02:27:42,442 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 420 transitions. Word has length 19 [2021-05-22 02:27:42,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:42,442 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 420 transitions. [2021-05-22 02:27:42,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:42,442 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 420 transitions. [2021-05-22 02:27:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:42,442 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:42,442 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:42,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-05-22 02:27:42,643 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:42,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:42,643 INFO L82 PathProgramCache]: Analyzing trace with hash 875020484, now seen corresponding path program 430 times [2021-05-22 02:27:42,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:42,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581535455] [2021-05-22 02:27:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:42,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:42,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581535455] [2021-05-22 02:27:42,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581535455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:42,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792067365] [2021-05-22 02:27:42,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:42,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:27:42,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:42,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:42,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:42,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792067365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:42,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:42,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:42,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059346410] [2021-05-22 02:27:42,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:42,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:42,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:42,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:42,971 INFO L87 Difference]: Start difference. First operand 193 states and 420 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:43,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:43,153 INFO L93 Difference]: Finished difference Result 211 states and 453 transitions. [2021-05-22 02:27:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:27:43,154 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:43,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:43,154 INFO L225 Difference]: With dead ends: 211 [2021-05-22 02:27:43,154 INFO L226 Difference]: Without dead ends: 209 [2021-05-22 02:27:43,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:27:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-22 02:27:43,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 191. [2021-05-22 02:27:43,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1842105263157894) internal successors, (415), 190 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 415 transitions. [2021-05-22 02:27:43,156 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 415 transitions. Word has length 19 [2021-05-22 02:27:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:43,156 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 415 transitions. [2021-05-22 02:27:43,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 415 transitions. [2021-05-22 02:27:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:43,156 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:43,156 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:43,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3192 [2021-05-22 02:27:43,357 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:43,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:43,357 INFO L82 PathProgramCache]: Analyzing trace with hash 253970657, now seen corresponding path program 431 times [2021-05-22 02:27:43,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:43,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586118482] [2021-05-22 02:27:43,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:43,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:43,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586118482] [2021-05-22 02:27:43,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586118482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:43,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676650354] [2021-05-22 02:27:43,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:43,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:27:43,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:43,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:43,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:43,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676650354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:43,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:43,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:43,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994119553] [2021-05-22 02:27:43,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:43,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:43,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:43,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:43,708 INFO L87 Difference]: Start difference. First operand 191 states and 415 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:43,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:43,863 INFO L93 Difference]: Finished difference Result 208 states and 449 transitions. [2021-05-22 02:27:43,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:27:43,863 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:43,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:43,863 INFO L225 Difference]: With dead ends: 208 [2021-05-22 02:27:43,863 INFO L226 Difference]: Without dead ends: 208 [2021-05-22 02:27:43,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 323.0ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:27:43,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-22 02:27:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 193. [2021-05-22 02:27:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1822916666666665) internal successors, (419), 192 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:43,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 419 transitions. [2021-05-22 02:27:43,865 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 419 transitions. Word has length 19 [2021-05-22 02:27:43,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:43,865 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 419 transitions. [2021-05-22 02:27:43,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:43,865 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 419 transitions. [2021-05-22 02:27:43,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:43,866 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:43,866 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:44,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3200,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:44,066 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:44,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:44,066 INFO L82 PathProgramCache]: Analyzing trace with hash 541520892, now seen corresponding path program 432 times [2021-05-22 02:27:44,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:44,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434697465] [2021-05-22 02:27:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:44,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:44,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434697465] [2021-05-22 02:27:44,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434697465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:44,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225529732] [2021-05-22 02:27:44,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:44,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:27:44,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:44,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:44,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:44,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225529732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:44,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:44,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:44,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011277016] [2021-05-22 02:27:44,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:44,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:44,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:44,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:44,387 INFO L87 Difference]: Start difference. First operand 193 states and 419 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:44,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:44,696 INFO L93 Difference]: Finished difference Result 243 states and 515 transitions. [2021-05-22 02:27:44,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:27:44,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:44,697 INFO L225 Difference]: With dead ends: 243 [2021-05-22 02:27:44,697 INFO L226 Difference]: Without dead ends: 243 [2021-05-22 02:27:44,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 377.5ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:27:44,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-22 02:27:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 194. [2021-05-22 02:27:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1968911917098444) internal successors, (424), 193 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 424 transitions. [2021-05-22 02:27:44,699 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 424 transitions. Word has length 19 [2021-05-22 02:27:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:44,699 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 424 transitions. [2021-05-22 02:27:44,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:44,699 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 424 transitions. [2021-05-22 02:27:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:44,699 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:44,699 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:44,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3208 [2021-05-22 02:27:44,899 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:44,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:44,900 INFO L82 PathProgramCache]: Analyzing trace with hash 843511172, now seen corresponding path program 433 times [2021-05-22 02:27:44,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:44,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394173908] [2021-05-22 02:27:44,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:45,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:45,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394173908] [2021-05-22 02:27:45,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394173908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:45,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253431251] [2021-05-22 02:27:45,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:45,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:45,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:45,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253431251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:45,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:45,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:45,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426856312] [2021-05-22 02:27:45,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:45,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:45,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:45,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:45,197 INFO L87 Difference]: Start difference. First operand 194 states and 424 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:45,392 INFO L93 Difference]: Finished difference Result 220 states and 473 transitions. [2021-05-22 02:27:45,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:27:45,392 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:45,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:45,392 INFO L225 Difference]: With dead ends: 220 [2021-05-22 02:27:45,393 INFO L226 Difference]: Without dead ends: 220 [2021-05-22 02:27:45,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:27:45,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-22 02:27:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 190. [2021-05-22 02:27:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.185185185185185) internal successors, (413), 189 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 413 transitions. [2021-05-22 02:27:45,394 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 413 transitions. Word has length 19 [2021-05-22 02:27:45,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:45,394 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 413 transitions. [2021-05-22 02:27:45,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 413 transitions. [2021-05-22 02:27:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:45,395 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:45,395 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:45,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3215,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:45,610 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:45,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:45,610 INFO L82 PathProgramCache]: Analyzing trace with hash -101768188, now seen corresponding path program 434 times [2021-05-22 02:27:45,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:45,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836257580] [2021-05-22 02:27:45,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:45,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:45,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836257580] [2021-05-22 02:27:45,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836257580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:45,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704022745] [2021-05-22 02:27:45,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:45,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:27:45,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:45,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:27:45,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:45,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704022745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:45,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:45,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:45,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031945593] [2021-05-22 02:27:45,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:45,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:45,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:45,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:45,934 INFO L87 Difference]: Start difference. First operand 190 states and 413 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:46,501 INFO L93 Difference]: Finished difference Result 262 states and 552 transitions. [2021-05-22 02:27:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:27:46,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:46,501 INFO L225 Difference]: With dead ends: 262 [2021-05-22 02:27:46,501 INFO L226 Difference]: Without dead ends: 262 [2021-05-22 02:27:46,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 615.8ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:27:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-22 02:27:46,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 193. [2021-05-22 02:27:46,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.203125) internal successors, (423), 192 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 423 transitions. [2021-05-22 02:27:46,503 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 423 transitions. Word has length 19 [2021-05-22 02:27:46,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:46,503 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 423 transitions. [2021-05-22 02:27:46,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:46,503 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 423 transitions. [2021-05-22 02:27:46,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:46,504 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:46,504 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:46,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3220 [2021-05-22 02:27:46,704 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:46,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:46,704 INFO L82 PathProgramCache]: Analyzing trace with hash -639623766, now seen corresponding path program 435 times [2021-05-22 02:27:46,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:46,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616575510] [2021-05-22 02:27:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:46,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:46,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616575510] [2021-05-22 02:27:46,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616575510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:46,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818884126] [2021-05-22 02:27:46,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:46,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:27:46,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:46,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:46,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:46,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818884126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:46,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:46,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:46,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766256500] [2021-05-22 02:27:46,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:46,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:46,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:46,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:46,982 INFO L87 Difference]: Start difference. First operand 193 states and 423 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:47,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:47,397 INFO L93 Difference]: Finished difference Result 231 states and 497 transitions. [2021-05-22 02:27:47,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:47,398 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:47,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:47,398 INFO L225 Difference]: With dead ends: 231 [2021-05-22 02:27:47,398 INFO L226 Difference]: Without dead ends: 231 [2021-05-22 02:27:47,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 473.1ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:27:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-22 02:27:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 193. [2021-05-22 02:27:47,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.203125) internal successors, (423), 192 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 423 transitions. [2021-05-22 02:27:47,400 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 423 transitions. Word has length 19 [2021-05-22 02:27:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:47,400 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 423 transitions. [2021-05-22 02:27:47,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 423 transitions. [2021-05-22 02:27:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:47,400 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:47,400 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:47,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3226,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:47,601 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:47,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:47,601 INFO L82 PathProgramCache]: Analyzing trace with hash -133277500, now seen corresponding path program 436 times [2021-05-22 02:27:47,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:47,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094901323] [2021-05-22 02:27:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:47,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:47,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094901323] [2021-05-22 02:27:47,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094901323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:47,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068961394] [2021-05-22 02:27:47,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:47,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:27:47,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:47,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:47,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:47,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068961394] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:47,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:47,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:47,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601268087] [2021-05-22 02:27:47,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:47,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:47,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:47,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:47,880 INFO L87 Difference]: Start difference. First operand 193 states and 423 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:48,036 INFO L93 Difference]: Finished difference Result 226 states and 485 transitions. [2021-05-22 02:27:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:27:48,036 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:48,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:48,037 INFO L225 Difference]: With dead ends: 226 [2021-05-22 02:27:48,037 INFO L226 Difference]: Without dead ends: 226 [2021-05-22 02:27:48,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:48,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-22 02:27:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 190. [2021-05-22 02:27:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.185185185185185) internal successors, (413), 189 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 413 transitions. [2021-05-22 02:27:48,039 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 413 transitions. Word has length 19 [2021-05-22 02:27:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:48,039 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 413 transitions. [2021-05-22 02:27:48,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 413 transitions. [2021-05-22 02:27:48,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:48,039 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:48,039 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:48,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3231 [2021-05-22 02:27:48,239 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:48,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:48,240 INFO L82 PathProgramCache]: Analyzing trace with hash 38292897, now seen corresponding path program 437 times [2021-05-22 02:27:48,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:48,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231970793] [2021-05-22 02:27:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:48,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:48,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231970793] [2021-05-22 02:27:48,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231970793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:48,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546258929] [2021-05-22 02:27:48,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:48,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:27:48,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:48,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:48,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:48,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546258929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:48,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:48,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:27:48,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940681455] [2021-05-22 02:27:48,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:48,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:48,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:48,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:48,605 INFO L87 Difference]: Start difference. First operand 190 states and 413 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:49,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:49,032 INFO L93 Difference]: Finished difference Result 216 states and 461 transitions. [2021-05-22 02:27:49,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:27:49,033 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:49,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:49,033 INFO L225 Difference]: With dead ends: 216 [2021-05-22 02:27:49,033 INFO L226 Difference]: Without dead ends: 207 [2021-05-22 02:27:49,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 552.0ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:27:49,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-22 02:27:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 193. [2021-05-22 02:27:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1822916666666665) internal successors, (419), 192 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:49,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 419 transitions. [2021-05-22 02:27:49,035 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 419 transitions. Word has length 19 [2021-05-22 02:27:49,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:49,035 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 419 transitions. [2021-05-22 02:27:49,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:49,035 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 419 transitions. [2021-05-22 02:27:49,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:49,035 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:49,035 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:49,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3236,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:49,236 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:49,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:49,236 INFO L82 PathProgramCache]: Analyzing trace with hash 325843132, now seen corresponding path program 438 times [2021-05-22 02:27:49,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:49,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86618010] [2021-05-22 02:27:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:49,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:49,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86618010] [2021-05-22 02:27:49,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86618010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:49,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459900451] [2021-05-22 02:27:49,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:49,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:27:49,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:49,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:49,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:49,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459900451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:49,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:49,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:27:49,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093235034] [2021-05-22 02:27:49,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:49,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:49,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:49,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:49,533 INFO L87 Difference]: Start difference. First operand 193 states and 419 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:50,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:50,140 INFO L93 Difference]: Finished difference Result 254 states and 537 transitions. [2021-05-22 02:27:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:27:50,141 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:50,141 INFO L225 Difference]: With dead ends: 254 [2021-05-22 02:27:50,141 INFO L226 Difference]: Without dead ends: 254 [2021-05-22 02:27:50,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 670.1ms TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:27:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-22 02:27:50,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 196. [2021-05-22 02:27:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.2051282051282053) internal successors, (430), 195 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 430 transitions. [2021-05-22 02:27:50,143 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 430 transitions. Word has length 19 [2021-05-22 02:27:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:50,143 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 430 transitions. [2021-05-22 02:27:50,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 430 transitions. [2021-05-22 02:27:50,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:50,143 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:50,143 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:50,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3244,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:50,344 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:50,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:50,344 INFO L82 PathProgramCache]: Analyzing trace with hash 627833412, now seen corresponding path program 439 times [2021-05-22 02:27:50,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:50,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226433245] [2021-05-22 02:27:50,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:50,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:50,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:50,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226433245] [2021-05-22 02:27:50,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226433245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:50,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741421672] [2021-05-22 02:27:50,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:50,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:50,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:50,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741421672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:50,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:50,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:27:50,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488372050] [2021-05-22 02:27:50,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:50,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:50,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:50,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:50,646 INFO L87 Difference]: Start difference. First operand 196 states and 430 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:51,209 INFO L93 Difference]: Finished difference Result 241 states and 517 transitions. [2021-05-22 02:27:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:27:51,210 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:51,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:51,210 INFO L225 Difference]: With dead ends: 241 [2021-05-22 02:27:51,210 INFO L226 Difference]: Without dead ends: 241 [2021-05-22 02:27:51,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 600.0ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:27:51,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-22 02:27:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 195. [2021-05-22 02:27:51,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.2061855670103094) internal successors, (428), 194 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:51,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 428 transitions. [2021-05-22 02:27:51,212 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 428 transitions. Word has length 19 [2021-05-22 02:27:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:51,212 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 428 transitions. [2021-05-22 02:27:51,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 428 transitions. [2021-05-22 02:27:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:51,212 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:51,212 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:51,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3251,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:51,413 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:51,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:51,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1134179678, now seen corresponding path program 440 times [2021-05-22 02:27:51,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:51,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254294979] [2021-05-22 02:27:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:51,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:51,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254294979] [2021-05-22 02:27:51,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254294979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:51,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091919797] [2021-05-22 02:27:51,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:51,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:27:51,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:51,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:51,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:51,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091919797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:51,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:51,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:27:51,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244313526] [2021-05-22 02:27:51,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:51,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:51,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:51,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:51,706 INFO L87 Difference]: Start difference. First operand 195 states and 428 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:52,170 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2021-05-22 02:27:52,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:52,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:52,170 INFO L225 Difference]: With dead ends: 238 [2021-05-22 02:27:52,170 INFO L226 Difference]: Without dead ends: 238 [2021-05-22 02:27:52,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 537.7ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:27:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-22 02:27:52,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 194. [2021-05-22 02:27:52,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.2072538860103625) internal successors, (426), 193 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:52,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 426 transitions. [2021-05-22 02:27:52,172 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 426 transitions. Word has length 19 [2021-05-22 02:27:52,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:52,172 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 426 transitions. [2021-05-22 02:27:52,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 426 transitions. [2021-05-22 02:27:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:52,172 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:52,172 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:52,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3256,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:52,373 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:52,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:52,373 INFO L82 PathProgramCache]: Analyzing trace with hash -348955260, now seen corresponding path program 441 times [2021-05-22 02:27:52,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:52,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680275273] [2021-05-22 02:27:52,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:52,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680275273] [2021-05-22 02:27:52,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680275273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209838720] [2021-05-22 02:27:52,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:52,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:27:52,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:52,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:27:52,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:52,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209838720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:52,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:52,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:27:52,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847268692] [2021-05-22 02:27:52,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:27:52,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:52,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:27:52,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:52,668 INFO L87 Difference]: Start difference. First operand 194 states and 426 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:52,941 INFO L93 Difference]: Finished difference Result 218 states and 469 transitions. [2021-05-22 02:27:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:27:52,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:52,942 INFO L225 Difference]: With dead ends: 218 [2021-05-22 02:27:52,942 INFO L226 Difference]: Without dead ends: 218 [2021-05-22 02:27:52,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 325.0ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:27:52,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-22 02:27:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 189. [2021-05-22 02:27:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-05-22 02:27:52,944 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-05-22 02:27:52,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:52,944 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-05-22 02:27:52,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:52,944 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-05-22 02:27:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:52,944 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:52,944 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:53,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3261,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:53,144 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:53,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:53,145 INFO L82 PathProgramCache]: Analyzing trace with hash -657700315, now seen corresponding path program 442 times [2021-05-22 02:27:53,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:53,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407709426] [2021-05-22 02:27:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:53,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:53,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407709426] [2021-05-22 02:27:53,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407709426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:53,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816984469] [2021-05-22 02:27:53,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:53,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:27:53,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:53,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:53,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:53,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816984469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:53,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:53,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:53,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021204911] [2021-05-22 02:27:53,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:53,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:53,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:53,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:53,438 INFO L87 Difference]: Start difference. First operand 189 states and 411 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:53,543 INFO L93 Difference]: Finished difference Result 198 states and 429 transitions. [2021-05-22 02:27:53,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:27:53,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:53,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:53,543 INFO L225 Difference]: With dead ends: 198 [2021-05-22 02:27:53,543 INFO L226 Difference]: Without dead ends: 198 [2021-05-22 02:27:53,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:53,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-22 02:27:53,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 189. [2021-05-22 02:27:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:53,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-05-22 02:27:53,545 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-05-22 02:27:53,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:53,545 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-05-22 02:27:53,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:53,545 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-05-22 02:27:53,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:53,546 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:53,546 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:53,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3266,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:53,746 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:53,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1728695779, now seen corresponding path program 443 times [2021-05-22 02:27:53,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:53,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146867778] [2021-05-22 02:27:53,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:53,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:53,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146867778] [2021-05-22 02:27:53,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146867778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:53,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416552098] [2021-05-22 02:27:53,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:53,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:27:53,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:53,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:53,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:54,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416552098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:54,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:54,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:54,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318820330] [2021-05-22 02:27:54,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:54,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:54,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:54,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:54,038 INFO L87 Difference]: Start difference. First operand 189 states and 411 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:54,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:54,365 INFO L93 Difference]: Finished difference Result 207 states and 447 transitions. [2021-05-22 02:27:54,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:27:54,365 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:54,365 INFO L225 Difference]: With dead ends: 207 [2021-05-22 02:27:54,365 INFO L226 Difference]: Without dead ends: 207 [2021-05-22 02:27:54,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 408.8ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:27:54,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-22 02:27:54,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-05-22 02:27:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:54,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-05-22 02:27:54,367 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-05-22 02:27:54,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:54,367 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-05-22 02:27:54,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-05-22 02:27:54,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:54,367 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:54,367 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:54,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3271 [2021-05-22 02:27:54,568 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:54,568 INFO L82 PathProgramCache]: Analyzing trace with hash -931960027, now seen corresponding path program 444 times [2021-05-22 02:27:54,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:54,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137864443] [2021-05-22 02:27:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:54,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:54,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137864443] [2021-05-22 02:27:54,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137864443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:54,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108609324] [2021-05-22 02:27:54,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:54,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:27:54,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:54,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:54,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:54,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108609324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:54,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:54,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:54,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799692838] [2021-05-22 02:27:54,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:54,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:54,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:54,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:54,858 INFO L87 Difference]: Start difference. First operand 189 states and 411 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:55,223 INFO L93 Difference]: Finished difference Result 207 states and 447 transitions. [2021-05-22 02:27:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:55,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:55,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:55,223 INFO L225 Difference]: With dead ends: 207 [2021-05-22 02:27:55,223 INFO L226 Difference]: Without dead ends: 207 [2021-05-22 02:27:55,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 410.1ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:27:55,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-22 02:27:55,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2021-05-22 02:27:55,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.1861702127659575) internal successors, (411), 188 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:55,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 411 transitions. [2021-05-22 02:27:55,225 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 411 transitions. Word has length 19 [2021-05-22 02:27:55,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:55,225 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 411 transitions. [2021-05-22 02:27:55,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:55,225 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 411 transitions. [2021-05-22 02:27:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:55,225 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:55,225 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:55,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-05-22 02:27:55,429 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:55,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:55,430 INFO L82 PathProgramCache]: Analyzing trace with hash -644409792, now seen corresponding path program 445 times [2021-05-22 02:27:55,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:55,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639761571] [2021-05-22 02:27:55,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:55,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:55,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639761571] [2021-05-22 02:27:55,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639761571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:55,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863588254] [2021-05-22 02:27:55,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:55,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:55,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:55,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:55,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863588254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:55,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:55,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:55,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356825132] [2021-05-22 02:27:55,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:55,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:55,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:55,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:55,754 INFO L87 Difference]: Start difference. First operand 189 states and 411 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:55,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:55,892 INFO L93 Difference]: Finished difference Result 199 states and 430 transitions. [2021-05-22 02:27:55,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:27:55,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:55,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:55,893 INFO L225 Difference]: With dead ends: 199 [2021-05-22 02:27:55,893 INFO L226 Difference]: Without dead ends: 199 [2021-05-22 02:27:55,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:27:55,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-22 02:27:55,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 184. [2021-05-22 02:27:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.169398907103825) internal successors, (397), 183 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:55,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 397 transitions. [2021-05-22 02:27:55,895 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 397 transitions. Word has length 19 [2021-05-22 02:27:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:55,895 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 397 transitions. [2021-05-22 02:27:55,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:55,895 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 397 transitions. [2021-05-22 02:27:55,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:55,895 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:55,895 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:56,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3283,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:56,095 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:56,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:56,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1083136579, now seen corresponding path program 446 times [2021-05-22 02:27:56,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:56,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802424302] [2021-05-22 02:27:56,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:56,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:56,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802424302] [2021-05-22 02:27:56,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802424302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:56,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944032499] [2021-05-22 02:27:56,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:56,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:27:56,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:56,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:27:56,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:56,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:56,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944032499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:56,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:56,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:56,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798005883] [2021-05-22 02:27:56,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:56,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:56,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:56,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:56,393 INFO L87 Difference]: Start difference. First operand 184 states and 397 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:56,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:56,675 INFO L93 Difference]: Finished difference Result 207 states and 443 transitions. [2021-05-22 02:27:56,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:27:56,675 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:56,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:56,675 INFO L225 Difference]: With dead ends: 207 [2021-05-22 02:27:56,675 INFO L226 Difference]: Without dead ends: 207 [2021-05-22 02:27:56,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 356.1ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:27:56,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-22 02:27:56,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 184. [2021-05-22 02:27:56,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.169398907103825) internal successors, (397), 183 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:56,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 397 transitions. [2021-05-22 02:27:56,677 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 397 transitions. Word has length 19 [2021-05-22 02:27:56,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:56,677 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 397 transitions. [2021-05-22 02:27:56,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:56,677 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 397 transitions. [2021-05-22 02:27:56,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:56,678 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:56,678 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:56,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3291 [2021-05-22 02:27:56,878 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:56,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:56,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1879872331, now seen corresponding path program 447 times [2021-05-22 02:27:56,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:56,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168735167] [2021-05-22 02:27:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:56,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:56,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168735167] [2021-05-22 02:27:56,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168735167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:56,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090677997] [2021-05-22 02:27:56,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:57,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:27:57,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:57,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:27:57,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:57,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090677997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:57,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:57,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:57,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686382873] [2021-05-22 02:27:57,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:57,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:57,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:57,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:57,236 INFO L87 Difference]: Start difference. First operand 184 states and 397 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:57,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:57,660 INFO L93 Difference]: Finished difference Result 223 states and 470 transitions. [2021-05-22 02:27:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:27:57,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:57,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:57,661 INFO L225 Difference]: With dead ends: 223 [2021-05-22 02:27:57,661 INFO L226 Difference]: Without dead ends: 220 [2021-05-22 02:27:57,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 525.1ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:27:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-22 02:27:57,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 184. [2021-05-22 02:27:57,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1639344262295084) internal successors, (396), 183 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:57,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 396 transitions. [2021-05-22 02:27:57,663 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 396 transitions. Word has length 19 [2021-05-22 02:27:57,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:57,663 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 396 transitions. [2021-05-22 02:27:57,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:57,663 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 396 transitions. [2021-05-22 02:27:57,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:57,663 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:57,663 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:57,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3296 [2021-05-22 02:27:57,864 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:57,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:57,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1287698872, now seen corresponding path program 448 times [2021-05-22 02:27:57,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:57,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399803347] [2021-05-22 02:27:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:57,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:57,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399803347] [2021-05-22 02:27:57,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399803347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:57,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159295634] [2021-05-22 02:27:57,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:58,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:27:58,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:58,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:58,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:58,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159295634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:58,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:58,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:58,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211758650] [2021-05-22 02:27:58,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:58,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:58,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:58,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:58,206 INFO L87 Difference]: Start difference. First operand 184 states and 396 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:58,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:58,464 INFO L93 Difference]: Finished difference Result 199 states and 423 transitions. [2021-05-22 02:27:58,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:58,465 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:58,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:58,465 INFO L225 Difference]: With dead ends: 199 [2021-05-22 02:27:58,465 INFO L226 Difference]: Without dead ends: 197 [2021-05-22 02:27:58,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:27:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-22 02:27:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 182. [2021-05-22 02:27:58,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.160220994475138) internal successors, (391), 181 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 391 transitions. [2021-05-22 02:27:58,467 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 391 transitions. Word has length 19 [2021-05-22 02:27:58,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:58,467 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 391 transitions. [2021-05-22 02:27:58,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 391 transitions. [2021-05-22 02:27:58,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:58,467 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:58,467 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:58,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3304,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:58,668 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:58,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:58,668 INFO L82 PathProgramCache]: Analyzing trace with hash -781352606, now seen corresponding path program 449 times [2021-05-22 02:27:58,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:58,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712628660] [2021-05-22 02:27:58,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:58,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:58,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712628660] [2021-05-22 02:27:58,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712628660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:58,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836047404] [2021-05-22 02:27:58,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:58,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:27:58,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:58,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:58,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:58,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836047404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:58,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:58,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:58,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996242749] [2021-05-22 02:27:58,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:58,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:58,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:58,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:58,969 INFO L87 Difference]: Start difference. First operand 182 states and 391 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:59,308 INFO L93 Difference]: Finished difference Result 266 states and 541 transitions. [2021-05-22 02:27:59,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:27:59,308 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:59,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:59,309 INFO L225 Difference]: With dead ends: 266 [2021-05-22 02:27:59,309 INFO L226 Difference]: Without dead ends: 266 [2021-05-22 02:27:59,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:27:59,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-22 02:27:59,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 185. [2021-05-22 02:27:59,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1739130434782608) internal successors, (400), 184 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 400 transitions. [2021-05-22 02:27:59,311 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 400 transitions. Word has length 19 [2021-05-22 02:27:59,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:59,311 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 400 transitions. [2021-05-22 02:27:59,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:59,311 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 400 transitions. [2021-05-22 02:27:59,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:59,311 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:59,311 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:27:59,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3312,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:59,511 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:27:59,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:27:59,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1319208184, now seen corresponding path program 450 times [2021-05-22 02:27:59,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:27:59,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241119839] [2021-05-22 02:27:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:27:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:27:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:59,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:27:59,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241119839] [2021-05-22 02:27:59,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241119839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:59,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180084683] [2021-05-22 02:27:59,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:27:59,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:27:59,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:27:59,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:27:59,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:27:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:27:59,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180084683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:27:59,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:27:59,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:27:59,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751269520] [2021-05-22 02:27:59,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:27:59,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:27:59,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:27:59,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:27:59,809 INFO L87 Difference]: Start difference. First operand 185 states and 400 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:59,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:27:59,978 INFO L93 Difference]: Finished difference Result 211 states and 449 transitions. [2021-05-22 02:27:59,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:27:59,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:27:59,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:27:59,978 INFO L225 Difference]: With dead ends: 211 [2021-05-22 02:27:59,979 INFO L226 Difference]: Without dead ends: 211 [2021-05-22 02:27:59,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:27:59,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-22 02:27:59,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 180. [2021-05-22 02:27:59,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1620111731843576) internal successors, (387), 179 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:59,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 387 transitions. [2021-05-22 02:27:59,980 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 387 transitions. Word has length 19 [2021-05-22 02:27:59,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:27:59,980 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 387 transitions. [2021-05-22 02:27:59,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:27:59,980 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 387 transitions. [2021-05-22 02:27:59,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:27:59,981 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:27:59,981 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:00,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3319 [2021-05-22 02:28:00,189 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:00,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:00,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1944373539, now seen corresponding path program 451 times [2021-05-22 02:28:00,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:00,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718217355] [2021-05-22 02:28:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:00,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:00,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718217355] [2021-05-22 02:28:00,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718217355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:00,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715797892] [2021-05-22 02:28:00,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:00,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:00,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:00,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715797892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:00,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:00,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:00,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959781861] [2021-05-22 02:28:00,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:00,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:00,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:00,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:00,481 INFO L87 Difference]: Start difference. First operand 180 states and 387 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:00,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:00,769 INFO L93 Difference]: Finished difference Result 206 states and 438 transitions. [2021-05-22 02:28:00,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:28:00,769 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:00,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:00,769 INFO L225 Difference]: With dead ends: 206 [2021-05-22 02:28:00,769 INFO L226 Difference]: Without dead ends: 206 [2021-05-22 02:28:00,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:28:00,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-22 02:28:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 180. [2021-05-22 02:28:00,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1620111731843576) internal successors, (387), 179 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:00,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 387 transitions. [2021-05-22 02:28:00,771 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 387 transitions. Word has length 19 [2021-05-22 02:28:00,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:00,771 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 387 transitions. [2021-05-22 02:28:00,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 387 transitions. [2021-05-22 02:28:00,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:00,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:00,771 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:00,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3324 [2021-05-22 02:28:00,972 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:00,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:00,972 INFO L82 PathProgramCache]: Analyzing trace with hash 222508706, now seen corresponding path program 452 times [2021-05-22 02:28:00,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:00,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045416941] [2021-05-22 02:28:00,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:01,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:01,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045416941] [2021-05-22 02:28:01,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045416941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:01,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302947324] [2021-05-22 02:28:01,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:01,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:28:01,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:01,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:01,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302947324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:01,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:01,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:01,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133758462] [2021-05-22 02:28:01,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:01,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:01,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:01,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:01,304 INFO L87 Difference]: Start difference. First operand 180 states and 387 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:01,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:01,548 INFO L93 Difference]: Finished difference Result 221 states and 453 transitions. [2021-05-22 02:28:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:28:01,548 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:01,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:01,548 INFO L225 Difference]: With dead ends: 221 [2021-05-22 02:28:01,548 INFO L226 Difference]: Without dead ends: 217 [2021-05-22 02:28:01,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 346.6ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:28:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-22 02:28:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 183. [2021-05-22 02:28:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.17032967032967) internal successors, (395), 182 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 395 transitions. [2021-05-22 02:28:01,550 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 395 transitions. Word has length 19 [2021-05-22 02:28:01,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:01,550 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 395 transitions. [2021-05-22 02:28:01,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:01,550 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 395 transitions. [2021-05-22 02:28:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:01,550 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:01,550 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:01,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3329,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:01,765 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:01,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:01,765 INFO L82 PathProgramCache]: Analyzing trace with hash -20241694, now seen corresponding path program 453 times [2021-05-22 02:28:01,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:01,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558601494] [2021-05-22 02:28:01,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:01,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:01,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:01,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558601494] [2021-05-22 02:28:01,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558601494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:01,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814919080] [2021-05-22 02:28:01,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:01,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:28:01,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:01,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:28:01,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:02,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814919080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:02,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:02,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:02,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650622133] [2021-05-22 02:28:02,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:02,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:02,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:02,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:02,089 INFO L87 Difference]: Start difference. First operand 183 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:02,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:02,302 INFO L93 Difference]: Finished difference Result 195 states and 416 transitions. [2021-05-22 02:28:02,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:28:02,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:02,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:02,303 INFO L225 Difference]: With dead ends: 195 [2021-05-22 02:28:02,303 INFO L226 Difference]: Without dead ends: 195 [2021-05-22 02:28:02,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-22 02:28:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-22 02:28:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 178. [2021-05-22 02:28:02,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.15819209039548) internal successors, (382), 177 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 382 transitions. [2021-05-22 02:28:02,305 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 382 transitions. Word has length 19 [2021-05-22 02:28:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:02,305 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 382 transitions. [2021-05-22 02:28:02,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:02,305 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 382 transitions. [2021-05-22 02:28:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:02,305 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:02,305 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:02,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3336 [2021-05-22 02:28:02,505 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:02,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:02,506 INFO L82 PathProgramCache]: Analyzing trace with hash -641291521, now seen corresponding path program 454 times [2021-05-22 02:28:02,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:02,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904424947] [2021-05-22 02:28:02,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:02,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:02,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904424947] [2021-05-22 02:28:02,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904424947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:02,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031858434] [2021-05-22 02:28:02,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:02,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:28:02,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:02,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:02,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:02,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031858434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:02,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:02,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:02,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655716944] [2021-05-22 02:28:02,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:02,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:02,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:02,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:02,857 INFO L87 Difference]: Start difference. First operand 178 states and 382 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:03,713 INFO L93 Difference]: Finished difference Result 290 states and 582 transitions. [2021-05-22 02:28:03,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:28:03,713 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:03,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:03,714 INFO L225 Difference]: With dead ends: 290 [2021-05-22 02:28:03,714 INFO L226 Difference]: Without dead ends: 290 [2021-05-22 02:28:03,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 856.1ms TimeCoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:28:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-05-22 02:28:03,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 183. [2021-05-22 02:28:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.17032967032967) internal successors, (395), 182 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:03,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 395 transitions. [2021-05-22 02:28:03,716 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 395 transitions. Word has length 19 [2021-05-22 02:28:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:03,716 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 395 transitions. [2021-05-22 02:28:03,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:03,716 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 395 transitions. [2021-05-22 02:28:03,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:03,716 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:03,716 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:03,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3344,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:03,929 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:03,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:03,929 INFO L82 PathProgramCache]: Analyzing trace with hash -353741286, now seen corresponding path program 455 times [2021-05-22 02:28:03,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:03,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497055915] [2021-05-22 02:28:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:04,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:04,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497055915] [2021-05-22 02:28:04,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497055915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:04,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142291236] [2021-05-22 02:28:04,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:04,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:28:04,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:04,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:04,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:04,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142291236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:04,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:04,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:04,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641279093] [2021-05-22 02:28:04,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:04,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:04,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:04,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:04,226 INFO L87 Difference]: Start difference. First operand 183 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:04,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:04,682 INFO L93 Difference]: Finished difference Result 266 states and 543 transitions. [2021-05-22 02:28:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:28:04,682 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:04,683 INFO L225 Difference]: With dead ends: 266 [2021-05-22 02:28:04,683 INFO L226 Difference]: Without dead ends: 266 [2021-05-22 02:28:04,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 490.5ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:28:04,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-22 02:28:04,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 184. [2021-05-22 02:28:04,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.185792349726776) internal successors, (400), 183 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 400 transitions. [2021-05-22 02:28:04,685 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 400 transitions. Word has length 19 [2021-05-22 02:28:04,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:04,685 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 400 transitions. [2021-05-22 02:28:04,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:04,685 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 400 transitions. [2021-05-22 02:28:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:04,685 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:04,685 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:04,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3352 [2021-05-22 02:28:04,885 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:04,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:04,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1981190685, now seen corresponding path program 456 times [2021-05-22 02:28:04,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:04,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405724975] [2021-05-22 02:28:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:04,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:04,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405724975] [2021-05-22 02:28:04,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405724975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:04,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935255000] [2021-05-22 02:28:04,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:05,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:28:05,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:05,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:05,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:05,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935255000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:05,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:05,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:05,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807839967] [2021-05-22 02:28:05,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:05,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:05,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:05,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:05,236 INFO L87 Difference]: Start difference. First operand 184 states and 400 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:05,518 INFO L93 Difference]: Finished difference Result 203 states and 433 transitions. [2021-05-22 02:28:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:28:05,518 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:05,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:05,518 INFO L225 Difference]: With dead ends: 203 [2021-05-22 02:28:05,518 INFO L226 Difference]: Without dead ends: 197 [2021-05-22 02:28:05,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 429.0ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:28:05,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-22 02:28:05,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 184. [2021-05-22 02:28:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.180327868852459) internal successors, (399), 183 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 399 transitions. [2021-05-22 02:28:05,520 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 399 transitions. Word has length 19 [2021-05-22 02:28:05,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:05,520 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 399 transitions. [2021-05-22 02:28:05,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:05,520 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 399 transitions. [2021-05-22 02:28:05,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:05,520 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:05,520 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:05,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3359 [2021-05-22 02:28:05,721 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:05,721 INFO L82 PathProgramCache]: Analyzing trace with hash -51751006, now seen corresponding path program 457 times [2021-05-22 02:28:05,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:05,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384196358] [2021-05-22 02:28:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:05,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:05,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:05,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384196358] [2021-05-22 02:28:05,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384196358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:05,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903059656] [2021-05-22 02:28:05,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:05,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:05,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:06,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903059656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:06,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:06,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:06,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61122733] [2021-05-22 02:28:06,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:06,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:06,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:06,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:06,025 INFO L87 Difference]: Start difference. First operand 184 states and 399 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:06,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:06,253 INFO L93 Difference]: Finished difference Result 210 states and 448 transitions. [2021-05-22 02:28:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:28:06,253 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:06,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:06,253 INFO L225 Difference]: With dead ends: 210 [2021-05-22 02:28:06,253 INFO L226 Difference]: Without dead ends: 210 [2021-05-22 02:28:06,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:28:06,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-22 02:28:06,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 181. [2021-05-22 02:28:06,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1666666666666665) internal successors, (390), 180 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 390 transitions. [2021-05-22 02:28:06,255 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 390 transitions. Word has length 19 [2021-05-22 02:28:06,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:06,255 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 390 transitions. [2021-05-22 02:28:06,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:06,255 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 390 transitions. [2021-05-22 02:28:06,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:06,255 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:06,255 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:06,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:06,456 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:06,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:06,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2124426459, now seen corresponding path program 458 times [2021-05-22 02:28:06,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:06,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661832986] [2021-05-22 02:28:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:06,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:06,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661832986] [2021-05-22 02:28:06,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661832986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:06,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690028683] [2021-05-22 02:28:06,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:06,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:28:06,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:06,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:06,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:06,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690028683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:06,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:06,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:06,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800490009] [2021-05-22 02:28:06,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:06,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:06,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:06,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:06,804 INFO L87 Difference]: Start difference. First operand 181 states and 390 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:06,997 INFO L93 Difference]: Finished difference Result 193 states and 414 transitions. [2021-05-22 02:28:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:28:06,997 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:06,997 INFO L225 Difference]: With dead ends: 193 [2021-05-22 02:28:06,997 INFO L226 Difference]: Without dead ends: 193 [2021-05-22 02:28:06,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-22 02:28:06,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 184. [2021-05-22 02:28:06,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1639344262295084) internal successors, (396), 183 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 396 transitions. [2021-05-22 02:28:06,999 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 396 transitions. Word has length 19 [2021-05-22 02:28:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:06,999 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 396 transitions. [2021-05-22 02:28:06,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 396 transitions. [2021-05-22 02:28:06,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:06,999 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:06,999 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:07,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3372,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:07,200 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:07,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:07,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1836876224, now seen corresponding path program 459 times [2021-05-22 02:28:07,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:07,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926614765] [2021-05-22 02:28:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:07,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:07,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926614765] [2021-05-22 02:28:07,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926614765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:07,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116736074] [2021-05-22 02:28:07,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:07,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:28:07,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:07,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-22 02:28:07,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:07,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116736074] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:07,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:07,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:07,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895837235] [2021-05-22 02:28:07,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:07,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:07,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:07,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:07,503 INFO L87 Difference]: Start difference. First operand 184 states and 396 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:08,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:08,059 INFO L93 Difference]: Finished difference Result 276 states and 564 transitions. [2021-05-22 02:28:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:28:08,059 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:08,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:08,059 INFO L225 Difference]: With dead ends: 276 [2021-05-22 02:28:08,059 INFO L226 Difference]: Without dead ends: 276 [2021-05-22 02:28:08,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 556.3ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:28:08,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-22 02:28:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 186. [2021-05-22 02:28:08,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.1837837837837837) internal successors, (404), 185 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:08,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 404 transitions. [2021-05-22 02:28:08,061 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 404 transitions. Word has length 19 [2021-05-22 02:28:08,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:08,061 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 404 transitions. [2021-05-22 02:28:08,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:08,061 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 404 transitions. [2021-05-22 02:28:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:08,062 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:08,062 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:08,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3380,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:08,277 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1534885944, now seen corresponding path program 460 times [2021-05-22 02:28:08,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:08,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085339084] [2021-05-22 02:28:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:08,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:08,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085339084] [2021-05-22 02:28:08,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085339084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:08,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284716511] [2021-05-22 02:28:08,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:08,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:28:08,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:08,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:08,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:08,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284716511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:08,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:08,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:08,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945228242] [2021-05-22 02:28:08,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:08,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:08,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:08,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:08,570 INFO L87 Difference]: Start difference. First operand 186 states and 404 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:08,915 INFO L93 Difference]: Finished difference Result 228 states and 486 transitions. [2021-05-22 02:28:08,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:28:08,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:08,916 INFO L225 Difference]: With dead ends: 228 [2021-05-22 02:28:08,916 INFO L226 Difference]: Without dead ends: 228 [2021-05-22 02:28:08,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 389.5ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:28:08,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-22 02:28:08,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 185. [2021-05-22 02:28:08,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.1847826086956523) internal successors, (402), 184 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 402 transitions. [2021-05-22 02:28:08,918 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 402 transitions. Word has length 19 [2021-05-22 02:28:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:08,918 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 402 transitions. [2021-05-22 02:28:08,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 402 transitions. [2021-05-22 02:28:08,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:08,918 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:08,918 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:09,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,461 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:09,118 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:09,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:09,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1028539678, now seen corresponding path program 461 times [2021-05-22 02:28:09,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:09,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468378570] [2021-05-22 02:28:09,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:09,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:09,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468378570] [2021-05-22 02:28:09,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468378570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:09,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465885951] [2021-05-22 02:28:09,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:09,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:28:09,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:09,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:28:09,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:09,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465885951] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:09,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:09,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:09,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171422266] [2021-05-22 02:28:09,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:09,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:09,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:09,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:09,424 INFO L87 Difference]: Start difference. First operand 185 states and 402 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:09,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:09,537 INFO L93 Difference]: Finished difference Result 222 states and 472 transitions. [2021-05-22 02:28:09,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:28:09,537 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:09,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:09,537 INFO L225 Difference]: With dead ends: 222 [2021-05-22 02:28:09,537 INFO L226 Difference]: Without dead ends: 222 [2021-05-22 02:28:09,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 221.2ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:09,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-22 02:28:09,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 181. [2021-05-22 02:28:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1666666666666665) internal successors, (390), 180 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:09,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 390 transitions. [2021-05-22 02:28:09,539 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 390 transitions. Word has length 19 [2021-05-22 02:28:09,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:09,539 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 390 transitions. [2021-05-22 02:28:09,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:09,539 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 390 transitions. [2021-05-22 02:28:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:09,539 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:09,539 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:09,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-05-22 02:28:09,741 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:09,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:09,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1307906685, now seen corresponding path program 462 times [2021-05-22 02:28:09,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:09,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289237085] [2021-05-22 02:28:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:09,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:09,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289237085] [2021-05-22 02:28:09,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289237085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:09,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068819820] [2021-05-22 02:28:09,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:09,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:28:09,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:09,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:09,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:10,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:10,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068819820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:10,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:10,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:10,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346800274] [2021-05-22 02:28:10,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:10,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:10,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:10,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:10,048 INFO L87 Difference]: Start difference. First operand 181 states and 390 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:10,367 INFO L93 Difference]: Finished difference Result 205 states and 438 transitions. [2021-05-22 02:28:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:28:10,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:10,367 INFO L225 Difference]: With dead ends: 205 [2021-05-22 02:28:10,367 INFO L226 Difference]: Without dead ends: 205 [2021-05-22 02:28:10,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 384.1ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:28:10,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-22 02:28:10,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 181. [2021-05-22 02:28:10,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1666666666666665) internal successors, (390), 180 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:10,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 390 transitions. [2021-05-22 02:28:10,369 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 390 transitions. Word has length 19 [2021-05-22 02:28:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:10,369 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 390 transitions. [2021-05-22 02:28:10,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:10,369 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 390 transitions. [2021-05-22 02:28:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:10,369 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:10,369 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:10,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3399,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:10,570 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:10,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:10,570 INFO L82 PathProgramCache]: Analyzing trace with hash -511170933, now seen corresponding path program 463 times [2021-05-22 02:28:10,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:10,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103867827] [2021-05-22 02:28:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:10,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:10,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103867827] [2021-05-22 02:28:10,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103867827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:10,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832582486] [2021-05-22 02:28:10,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:10,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:10,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:10,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832582486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:10,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:10,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:10,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129948119] [2021-05-22 02:28:10,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:10,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:10,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:10,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:10,870 INFO L87 Difference]: Start difference. First operand 181 states and 390 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:11,165 INFO L93 Difference]: Finished difference Result 221 states and 466 transitions. [2021-05-22 02:28:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:28:11,165 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:11,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:11,166 INFO L225 Difference]: With dead ends: 221 [2021-05-22 02:28:11,166 INFO L226 Difference]: Without dead ends: 218 [2021-05-22 02:28:11,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:28:11,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-22 02:28:11,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 181. [2021-05-22 02:28:11,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.161111111111111) internal successors, (389), 180 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 389 transitions. [2021-05-22 02:28:11,167 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 389 transitions. Word has length 19 [2021-05-22 02:28:11,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:11,167 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 389 transitions. [2021-05-22 02:28:11,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:11,167 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 389 transitions. [2021-05-22 02:28:11,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:11,168 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:11,168 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:11,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3404 [2021-05-22 02:28:11,368 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:11,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:11,368 INFO L82 PathProgramCache]: Analyzing trace with hash 616225160, now seen corresponding path program 464 times [2021-05-22 02:28:11,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:11,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959231421] [2021-05-22 02:28:11,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:11,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:11,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959231421] [2021-05-22 02:28:11,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959231421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:11,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115093671] [2021-05-22 02:28:11,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:11,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:28:11,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:11,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:11,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:11,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115093671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:11,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:11,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:11,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133184772] [2021-05-22 02:28:11,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:11,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:11,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:11,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:11,693 INFO L87 Difference]: Start difference. First operand 181 states and 389 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:11,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:11,924 INFO L93 Difference]: Finished difference Result 193 states and 412 transitions. [2021-05-22 02:28:11,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:28:11,924 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:11,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:11,924 INFO L225 Difference]: With dead ends: 193 [2021-05-22 02:28:11,924 INFO L226 Difference]: Without dead ends: 193 [2021-05-22 02:28:11,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:28:11,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-22 02:28:11,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 176. [2021-05-22 02:28:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.16) internal successors, (378), 175 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:11,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 378 transitions. [2021-05-22 02:28:11,926 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 378 transitions. Word has length 19 [2021-05-22 02:28:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:11,926 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 378 transitions. [2021-05-22 02:28:11,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:11,926 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 378 transitions. [2021-05-22 02:28:11,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:11,926 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:11,926 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:12,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3411,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:12,127 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:12,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1122571426, now seen corresponding path program 465 times [2021-05-22 02:28:12,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:12,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937563026] [2021-05-22 02:28:12,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:12,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:12,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937563026] [2021-05-22 02:28:12,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937563026] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:12,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607485474] [2021-05-22 02:28:12,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:12,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:28:12,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:12,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:28:12,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:12,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607485474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:12,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:12,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:12,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981467621] [2021-05-22 02:28:12,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:12,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:12,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:12,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:12,433 INFO L87 Difference]: Start difference. First operand 176 states and 378 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:12,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:12,770 INFO L93 Difference]: Finished difference Result 244 states and 502 transitions. [2021-05-22 02:28:12,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:28:12,770 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:12,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:12,770 INFO L225 Difference]: With dead ends: 244 [2021-05-22 02:28:12,770 INFO L226 Difference]: Without dead ends: 244 [2021-05-22 02:28:12,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:28:12,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-22 02:28:12,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 183. [2021-05-22 02:28:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.17032967032967) internal successors, (395), 182 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 395 transitions. [2021-05-22 02:28:12,772 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 395 transitions. Word has length 19 [2021-05-22 02:28:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:12,772 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 395 transitions. [2021-05-22 02:28:12,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:12,772 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 395 transitions. [2021-05-22 02:28:12,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:12,772 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:12,772 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:12,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3419 [2021-05-22 02:28:12,973 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:12,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:12,973 INFO L82 PathProgramCache]: Analyzing trace with hash 584715848, now seen corresponding path program 466 times [2021-05-22 02:28:12,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:12,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654395375] [2021-05-22 02:28:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:13,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:13,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654395375] [2021-05-22 02:28:13,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654395375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:13,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319235069] [2021-05-22 02:28:13,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:13,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:28:13,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:13,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:13,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:13,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319235069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:13,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:13,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:13,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773318286] [2021-05-22 02:28:13,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:13,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:13,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:13,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:13,267 INFO L87 Difference]: Start difference. First operand 183 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:13,477 INFO L93 Difference]: Finished difference Result 209 states and 444 transitions. [2021-05-22 02:28:13,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:28:13,477 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:13,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:13,478 INFO L225 Difference]: With dead ends: 209 [2021-05-22 02:28:13,478 INFO L226 Difference]: Without dead ends: 209 [2021-05-22 02:28:13,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 272.0ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:28:13,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-22 02:28:13,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 175. [2021-05-22 02:28:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.160919540229885) internal successors, (376), 174 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 376 transitions. [2021-05-22 02:28:13,479 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 376 transitions. Word has length 19 [2021-05-22 02:28:13,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:13,479 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 376 transitions. [2021-05-22 02:28:13,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:13,480 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 376 transitions. [2021-05-22 02:28:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:13,480 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:13,480 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:13,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3426,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:13,689 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:13,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:13,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1695154842, now seen corresponding path program 467 times [2021-05-22 02:28:13,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:13,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344690037] [2021-05-22 02:28:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:13,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:13,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344690037] [2021-05-22 02:28:13,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344690037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:13,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896962995] [2021-05-22 02:28:13,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:13,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:28:13,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:13,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:13,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:13,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896962995] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:13,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:13,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:13,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345288563] [2021-05-22 02:28:13,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:13,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:13,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:13,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:13,998 INFO L87 Difference]: Start difference. First operand 175 states and 376 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:14,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:14,326 INFO L93 Difference]: Finished difference Result 227 states and 473 transitions. [2021-05-22 02:28:14,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:28:14,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:14,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:14,327 INFO L225 Difference]: With dead ends: 227 [2021-05-22 02:28:14,327 INFO L226 Difference]: Without dead ends: 225 [2021-05-22 02:28:14,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 419.3ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:28:14,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-22 02:28:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 180. [2021-05-22 02:28:14,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1675977653631286) internal successors, (388), 179 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:14,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 388 transitions. [2021-05-22 02:28:14,328 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 388 transitions. Word has length 19 [2021-05-22 02:28:14,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:14,329 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 388 transitions. [2021-05-22 02:28:14,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:14,329 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 388 transitions. [2021-05-22 02:28:14,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:14,329 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:14,329 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:14,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3431,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:14,533 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:14,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:14,533 INFO L82 PathProgramCache]: Analyzing trace with hash -360563512, now seen corresponding path program 468 times [2021-05-22 02:28:14,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:14,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256114013] [2021-05-22 02:28:14,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:14,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:14,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256114013] [2021-05-22 02:28:14,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256114013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:14,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666118809] [2021-05-22 02:28:14,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:14,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:28:14,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:14,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:14,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:14,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666118809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:14,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:14,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:14,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730233589] [2021-05-22 02:28:14,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:14,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:14,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:14,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:14,814 INFO L87 Difference]: Start difference. First operand 180 states and 388 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:15,238 INFO L93 Difference]: Finished difference Result 240 states and 500 transitions. [2021-05-22 02:28:15,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:28:15,238 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:15,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:15,238 INFO L225 Difference]: With dead ends: 240 [2021-05-22 02:28:15,238 INFO L226 Difference]: Without dead ends: 240 [2021-05-22 02:28:15,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:28:15,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-22 02:28:15,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 180. [2021-05-22 02:28:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1675977653631286) internal successors, (388), 179 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 388 transitions. [2021-05-22 02:28:15,240 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 388 transitions. Word has length 19 [2021-05-22 02:28:15,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:15,240 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 388 transitions. [2021-05-22 02:28:15,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:15,240 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 388 transitions. [2021-05-22 02:28:15,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:15,241 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:15,241 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:15,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3439,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:15,441 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:15,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:15,441 INFO L82 PathProgramCache]: Analyzing trace with hash -898419090, now seen corresponding path program 469 times [2021-05-22 02:28:15,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:15,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488885434] [2021-05-22 02:28:15,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:15,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:15,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488885434] [2021-05-22 02:28:15,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488885434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:15,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615733526] [2021-05-22 02:28:15,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:15,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:15,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:15,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615733526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:15,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:15,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:15,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598262806] [2021-05-22 02:28:15,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:15,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:15,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:15,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:15,717 INFO L87 Difference]: Start difference. First operand 180 states and 388 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:16,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:16,043 INFO L93 Difference]: Finished difference Result 222 states and 470 transitions. [2021-05-22 02:28:16,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:28:16,043 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:16,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:16,044 INFO L225 Difference]: With dead ends: 222 [2021-05-22 02:28:16,044 INFO L226 Difference]: Without dead ends: 222 [2021-05-22 02:28:16,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 410.6ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:28:16,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-22 02:28:16,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 180. [2021-05-22 02:28:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.1675977653631286) internal successors, (388), 179 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:16,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 388 transitions. [2021-05-22 02:28:16,045 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 388 transitions. Word has length 19 [2021-05-22 02:28:16,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:16,045 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 388 transitions. [2021-05-22 02:28:16,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:16,046 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 388 transitions. [2021-05-22 02:28:16,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:16,046 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:16,046 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:16,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3446,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:16,246 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:16,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:16,246 INFO L82 PathProgramCache]: Analyzing trace with hash -392072824, now seen corresponding path program 470 times [2021-05-22 02:28:16,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:16,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238248185] [2021-05-22 02:28:16,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:16,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:16,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238248185] [2021-05-22 02:28:16,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238248185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:16,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494193887] [2021-05-22 02:28:16,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:16,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:28:16,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:16,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:16,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:16,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494193887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:16,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:16,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:16,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061886882] [2021-05-22 02:28:16,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:16,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:16,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:16,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:16,525 INFO L87 Difference]: Start difference. First operand 180 states and 388 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:16,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:16,712 INFO L93 Difference]: Finished difference Result 215 states and 455 transitions. [2021-05-22 02:28:16,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:28:16,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:16,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:16,712 INFO L225 Difference]: With dead ends: 215 [2021-05-22 02:28:16,712 INFO L226 Difference]: Without dead ends: 215 [2021-05-22 02:28:16,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-22 02:28:16,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 175. [2021-05-22 02:28:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1551724137931036) internal successors, (375), 174 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:16,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 375 transitions. [2021-05-22 02:28:16,714 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 375 transitions. Word has length 19 [2021-05-22 02:28:16,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:16,714 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 375 transitions. [2021-05-22 02:28:16,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:16,714 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 375 transitions. [2021-05-22 02:28:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:16,715 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:16,715 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:16,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3451 [2021-05-22 02:28:16,915 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:16,915 INFO L82 PathProgramCache]: Analyzing trace with hash -220502427, now seen corresponding path program 471 times [2021-05-22 02:28:16,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:16,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106088878] [2021-05-22 02:28:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:17,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:17,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106088878] [2021-05-22 02:28:17,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106088878] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:17,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218490641] [2021-05-22 02:28:17,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:17,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:28:17,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:17,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:28:17,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:17,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218490641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:17,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:17,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:17,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260163565] [2021-05-22 02:28:17,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:17,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:17,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:17,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:17,284 INFO L87 Difference]: Start difference. First operand 175 states and 375 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:17,776 INFO L93 Difference]: Finished difference Result 199 states and 419 transitions. [2021-05-22 02:28:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:28:17,777 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:17,777 INFO L225 Difference]: With dead ends: 199 [2021-05-22 02:28:17,777 INFO L226 Difference]: Without dead ends: 187 [2021-05-22 02:28:17,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 599.7ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:28:17,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-22 02:28:17,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 179. [2021-05-22 02:28:17,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.151685393258427) internal successors, (383), 178 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:17,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 383 transitions. [2021-05-22 02:28:17,778 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 383 transitions. Word has length 19 [2021-05-22 02:28:17,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:17,779 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 383 transitions. [2021-05-22 02:28:17,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:17,779 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 383 transitions. [2021-05-22 02:28:17,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:17,779 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:17,779 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:17,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3456,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:17,979 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:17,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:17,979 INFO L82 PathProgramCache]: Analyzing trace with hash 67047808, now seen corresponding path program 472 times [2021-05-22 02:28:17,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:17,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064078336] [2021-05-22 02:28:17,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:18,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:18,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064078336] [2021-05-22 02:28:18,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064078336] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:18,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840688102] [2021-05-22 02:28:18,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:18,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:28:18,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:18,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:18,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:18,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840688102] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:18,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:18,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:18,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889985884] [2021-05-22 02:28:18,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:18,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:18,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:18,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:18,275 INFO L87 Difference]: Start difference. First operand 179 states and 383 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:19,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:19,055 INFO L93 Difference]: Finished difference Result 247 states and 509 transitions. [2021-05-22 02:28:19,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:28:19,055 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:19,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:19,056 INFO L225 Difference]: With dead ends: 247 [2021-05-22 02:28:19,056 INFO L226 Difference]: Without dead ends: 247 [2021-05-22 02:28:19,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 758.8ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:28:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-22 02:28:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 182. [2021-05-22 02:28:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.1767955801104972) internal successors, (394), 181 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 394 transitions. [2021-05-22 02:28:19,057 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 394 transitions. Word has length 19 [2021-05-22 02:28:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:19,058 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 394 transitions. [2021-05-22 02:28:19,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 394 transitions. [2021-05-22 02:28:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:19,058 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:19,058 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:19,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:19,258 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:19,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:19,258 INFO L82 PathProgramCache]: Analyzing trace with hash 369038088, now seen corresponding path program 473 times [2021-05-22 02:28:19,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:19,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233743843] [2021-05-22 02:28:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:19,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:19,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233743843] [2021-05-22 02:28:19,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233743843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:19,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070273475] [2021-05-22 02:28:19,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:19,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:28:19,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:19,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-22 02:28:19,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:19,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070273475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:19,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:19,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:19,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132322394] [2021-05-22 02:28:19,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:19,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:19,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:19,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:19,631 INFO L87 Difference]: Start difference. First operand 182 states and 394 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:20,192 INFO L93 Difference]: Finished difference Result 227 states and 481 transitions. [2021-05-22 02:28:20,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:28:20,192 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:20,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:20,193 INFO L225 Difference]: With dead ends: 227 [2021-05-22 02:28:20,193 INFO L226 Difference]: Without dead ends: 227 [2021-05-22 02:28:20,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 636.3ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:28:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-22 02:28:20,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 181. [2021-05-22 02:28:20,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.1777777777777776) internal successors, (392), 180 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 392 transitions. [2021-05-22 02:28:20,194 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 392 transitions. Word has length 19 [2021-05-22 02:28:20,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:20,195 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 392 transitions. [2021-05-22 02:28:20,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:20,195 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 392 transitions. [2021-05-22 02:28:20,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:20,195 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:20,195 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:20,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3471 [2021-05-22 02:28:20,395 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:20,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:20,395 INFO L82 PathProgramCache]: Analyzing trace with hash 875384354, now seen corresponding path program 474 times [2021-05-22 02:28:20,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:20,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941769316] [2021-05-22 02:28:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:20,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:20,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941769316] [2021-05-22 02:28:20,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941769316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:20,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248151338] [2021-05-22 02:28:20,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:20,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:28:20,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:20,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:20,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:20,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:20,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248151338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:20,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:20,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:20,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961995926] [2021-05-22 02:28:20,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:20,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:20,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:20,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:20,686 INFO L87 Difference]: Start difference. First operand 181 states and 392 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:21,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:21,163 INFO L93 Difference]: Finished difference Result 224 states and 476 transitions. [2021-05-22 02:28:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:28:21,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:21,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:21,164 INFO L225 Difference]: With dead ends: 224 [2021-05-22 02:28:21,164 INFO L226 Difference]: Without dead ends: 224 [2021-05-22 02:28:21,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 533.1ms TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:28:21,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-22 02:28:21,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 180. [2021-05-22 02:28:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.17877094972067) internal successors, (390), 179 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 390 transitions. [2021-05-22 02:28:21,166 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 390 transitions. Word has length 19 [2021-05-22 02:28:21,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:21,166 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 390 transitions. [2021-05-22 02:28:21,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:21,166 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 390 transitions. [2021-05-22 02:28:21,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:21,166 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:21,166 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:21,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3478,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:21,367 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:21,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:21,367 INFO L82 PathProgramCache]: Analyzing trace with hash -607750584, now seen corresponding path program 475 times [2021-05-22 02:28:21,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:21,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549553102] [2021-05-22 02:28:21,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:21,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:21,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549553102] [2021-05-22 02:28:21,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549553102] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:21,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865805614] [2021-05-22 02:28:21,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:21,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:21,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:21,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865805614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:21,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:21,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:21,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706696373] [2021-05-22 02:28:21,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:21,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:21,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:21,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:21,643 INFO L87 Difference]: Start difference. First operand 180 states and 390 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:21,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:21,922 INFO L93 Difference]: Finished difference Result 204 states and 433 transitions. [2021-05-22 02:28:21,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:28:21,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:21,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:21,923 INFO L225 Difference]: With dead ends: 204 [2021-05-22 02:28:21,923 INFO L226 Difference]: Without dead ends: 204 [2021-05-22 02:28:21,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 335.9ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:28:21,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-22 02:28:21,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 175. [2021-05-22 02:28:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1551724137931036) internal successors, (375), 174 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 375 transitions. [2021-05-22 02:28:21,925 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 375 transitions. Word has length 19 [2021-05-22 02:28:21,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:21,925 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 375 transitions. [2021-05-22 02:28:21,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:21,925 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 375 transitions. [2021-05-22 02:28:21,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:21,925 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:21,925 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:22,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3483 [2021-05-22 02:28:22,125 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:22,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:22,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1039160257, now seen corresponding path program 476 times [2021-05-22 02:28:22,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:22,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82368229] [2021-05-22 02:28:22,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:22,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:22,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82368229] [2021-05-22 02:28:22,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82368229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:22,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777633151] [2021-05-22 02:28:22,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:22,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:28:22,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:22,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-22 02:28:22,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:22,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777633151] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:22,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:22,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:22,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922129671] [2021-05-22 02:28:22,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:22,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:22,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:22,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:22,464 INFO L87 Difference]: Start difference. First operand 175 states and 375 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:22,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:22,833 INFO L93 Difference]: Finished difference Result 211 states and 445 transitions. [2021-05-22 02:28:22,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:28:22,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:22,834 INFO L225 Difference]: With dead ends: 211 [2021-05-22 02:28:22,834 INFO L226 Difference]: Without dead ends: 211 [2021-05-22 02:28:22,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 442.9ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:28:22,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-22 02:28:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 175. [2021-05-22 02:28:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1551724137931036) internal successors, (375), 174 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:22,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 375 transitions. [2021-05-22 02:28:22,835 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 375 transitions. Word has length 19 [2021-05-22 02:28:22,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:22,836 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 375 transitions. [2021-05-22 02:28:22,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:22,836 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 375 transitions. [2021-05-22 02:28:22,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:22,836 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:22,836 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:23,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3488,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:23,036 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:23,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:23,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1127721988, now seen corresponding path program 477 times [2021-05-22 02:28:23,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:23,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566353573] [2021-05-22 02:28:23,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:23,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:23,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566353573] [2021-05-22 02:28:23,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566353573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:23,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109517048] [2021-05-22 02:28:23,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:23,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:28:23,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:23,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:23,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:23,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109517048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:23,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:23,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:23,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494597374] [2021-05-22 02:28:23,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:23,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:23,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:23,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:23,371 INFO L87 Difference]: Start difference. First operand 175 states and 375 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:23,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:23,780 INFO L93 Difference]: Finished difference Result 213 states and 439 transitions. [2021-05-22 02:28:23,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:28:23,781 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:23,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:23,781 INFO L225 Difference]: With dead ends: 213 [2021-05-22 02:28:23,781 INFO L226 Difference]: Without dead ends: 207 [2021-05-22 02:28:23,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 460.9ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:28:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-22 02:28:23,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 175. [2021-05-22 02:28:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.132183908045977) internal successors, (371), 174 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:23,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 371 transitions. [2021-05-22 02:28:23,783 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 371 transitions. Word has length 19 [2021-05-22 02:28:23,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:23,783 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 371 transitions. [2021-05-22 02:28:23,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:23,783 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 371 transitions. [2021-05-22 02:28:23,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:23,783 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:23,783 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:23,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3492 [2021-05-22 02:28:23,983 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:23,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:23,984 INFO L82 PathProgramCache]: Analyzing trace with hash -242424505, now seen corresponding path program 478 times [2021-05-22 02:28:23,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:23,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017480930] [2021-05-22 02:28:23,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:24,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:24,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017480930] [2021-05-22 02:28:24,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017480930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:24,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574350006] [2021-05-22 02:28:24,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:24,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:28:24,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:24,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:24,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:24,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574350006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:24,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:24,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:24,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047450324] [2021-05-22 02:28:24,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:24,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:24,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:24,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:24,292 INFO L87 Difference]: Start difference. First operand 175 states and 371 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:24,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:24,738 INFO L93 Difference]: Finished difference Result 220 states and 456 transitions. [2021-05-22 02:28:24,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:28:24,739 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:24,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:24,739 INFO L225 Difference]: With dead ends: 220 [2021-05-22 02:28:24,739 INFO L226 Difference]: Without dead ends: 217 [2021-05-22 02:28:24,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 462.2ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:28:24,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-22 02:28:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 175. [2021-05-22 02:28:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1264367816091956) internal successors, (370), 174 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 370 transitions. [2021-05-22 02:28:24,741 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 370 transitions. Word has length 19 [2021-05-22 02:28:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:24,741 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 370 transitions. [2021-05-22 02:28:24,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 370 transitions. [2021-05-22 02:28:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:24,741 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:24,741 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:24,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3499,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:24,941 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:24,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:24,942 INFO L82 PathProgramCache]: Analyzing trace with hash 884971588, now seen corresponding path program 479 times [2021-05-22 02:28:24,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:24,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277982816] [2021-05-22 02:28:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:25,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:25,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277982816] [2021-05-22 02:28:25,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277982816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:25,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655458210] [2021-05-22 02:28:25,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:25,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:28:25,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:25,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:25,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:25,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655458210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:25,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:25,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:25,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937473766] [2021-05-22 02:28:25,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:25,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:25,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:25,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:25,278 INFO L87 Difference]: Start difference. First operand 175 states and 370 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:25,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:25,536 INFO L93 Difference]: Finished difference Result 196 states and 410 transitions. [2021-05-22 02:28:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:28:25,536 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:25,536 INFO L225 Difference]: With dead ends: 196 [2021-05-22 02:28:25,536 INFO L226 Difference]: Without dead ends: 196 [2021-05-22 02:28:25,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 369.8ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:28:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-22 02:28:25,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 170. [2021-05-22 02:28:25,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1242603550295858) internal successors, (359), 169 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:25,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 359 transitions. [2021-05-22 02:28:25,538 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 359 transitions. Word has length 19 [2021-05-22 02:28:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:25,538 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 359 transitions. [2021-05-22 02:28:25,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 359 transitions. [2021-05-22 02:28:25,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:25,538 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:25,539 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:25,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3506 [2021-05-22 02:28:25,739 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:25,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:25,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1391317854, now seen corresponding path program 480 times [2021-05-22 02:28:25,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:25,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316186520] [2021-05-22 02:28:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:25,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:25,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:25,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316186520] [2021-05-22 02:28:25,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316186520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:25,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933805982] [2021-05-22 02:28:25,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:25,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:28:25,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:25,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:25,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:26,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933805982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:26,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:26,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:26,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264066838] [2021-05-22 02:28:26,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:26,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:26,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:26,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:26,032 INFO L87 Difference]: Start difference. First operand 170 states and 359 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:26,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:26,375 INFO L93 Difference]: Finished difference Result 242 states and 497 transitions. [2021-05-22 02:28:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:28:26,375 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:26,376 INFO L225 Difference]: With dead ends: 242 [2021-05-22 02:28:26,376 INFO L226 Difference]: Without dead ends: 242 [2021-05-22 02:28:26,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 356.4ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:28:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-22 02:28:26,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 174. [2021-05-22 02:28:26,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.132947976878613) internal successors, (369), 173 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 369 transitions. [2021-05-22 02:28:26,378 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 369 transitions. Word has length 19 [2021-05-22 02:28:26,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:26,378 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 369 transitions. [2021-05-22 02:28:26,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:26,378 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 369 transitions. [2021-05-22 02:28:26,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:26,378 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:26,378 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:26,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3514,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:26,578 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:26,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:26,579 INFO L82 PathProgramCache]: Analyzing trace with hash 853462276, now seen corresponding path program 481 times [2021-05-22 02:28:26,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:26,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070489683] [2021-05-22 02:28:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:26,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:26,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070489683] [2021-05-22 02:28:26,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070489683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:26,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989676544] [2021-05-22 02:28:26,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:26,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:26,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:26,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989676544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:26,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:26,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:26,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260097732] [2021-05-22 02:28:26,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:26,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:26,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:26,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:26,883 INFO L87 Difference]: Start difference. First operand 174 states and 369 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:27,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:27,282 INFO L93 Difference]: Finished difference Result 210 states and 438 transitions. [2021-05-22 02:28:27,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:28:27,283 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:27,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:27,283 INFO L225 Difference]: With dead ends: 210 [2021-05-22 02:28:27,283 INFO L226 Difference]: Without dead ends: 210 [2021-05-22 02:28:27,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 418.3ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:28:27,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-22 02:28:27,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 170. [2021-05-22 02:28:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1242603550295858) internal successors, (359), 169 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 359 transitions. [2021-05-22 02:28:27,285 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 359 transitions. Word has length 19 [2021-05-22 02:28:27,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:27,285 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 359 transitions. [2021-05-22 02:28:27,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:27,285 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 359 transitions. [2021-05-22 02:28:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:27,285 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:27,285 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:27,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,482 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:27,485 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:27,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:27,486 INFO L82 PathProgramCache]: Analyzing trace with hash -91817084, now seen corresponding path program 482 times [2021-05-22 02:28:27,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:27,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694903792] [2021-05-22 02:28:27,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:27,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:27,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694903792] [2021-05-22 02:28:27,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694903792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:27,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324144737] [2021-05-22 02:28:27,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:27,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:28:27,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:27,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:27,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:27,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324144737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:27,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:27,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:27,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498421792] [2021-05-22 02:28:27,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:27,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:27,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:27,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:27,765 INFO L87 Difference]: Start difference. First operand 170 states and 359 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:28,266 INFO L93 Difference]: Finished difference Result 251 states and 508 transitions. [2021-05-22 02:28:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:28:28,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:28,266 INFO L225 Difference]: With dead ends: 251 [2021-05-22 02:28:28,266 INFO L226 Difference]: Without dead ends: 251 [2021-05-22 02:28:28,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 481.3ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:28:28,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-22 02:28:28,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 176. [2021-05-22 02:28:28,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.142857142857143) internal successors, (375), 175 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 375 transitions. [2021-05-22 02:28:28,268 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 375 transitions. Word has length 19 [2021-05-22 02:28:28,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:28,268 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 375 transitions. [2021-05-22 02:28:28,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:28,269 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 375 transitions. [2021-05-22 02:28:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:28,269 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:28,269 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:28,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3526,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:28,469 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:28,469 INFO L82 PathProgramCache]: Analyzing trace with hash -629672662, now seen corresponding path program 483 times [2021-05-22 02:28:28,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:28,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464716162] [2021-05-22 02:28:28,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:28,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:28,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:28,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464716162] [2021-05-22 02:28:28,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464716162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:28,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511054675] [2021-05-22 02:28:28,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:28,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:28:28,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:28,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:28,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:28,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511054675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:28,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:28,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:28,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116550650] [2021-05-22 02:28:28,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:28,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:28,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:28,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:28,753 INFO L87 Difference]: Start difference. First operand 176 states and 375 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:29,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:29,129 INFO L93 Difference]: Finished difference Result 230 states and 480 transitions. [2021-05-22 02:28:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:28:29,129 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:29,130 INFO L225 Difference]: With dead ends: 230 [2021-05-22 02:28:29,130 INFO L226 Difference]: Without dead ends: 230 [2021-05-22 02:28:29,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 374.0ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:28:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-22 02:28:29,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 175. [2021-05-22 02:28:29,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1436781609195403) internal successors, (373), 174 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 373 transitions. [2021-05-22 02:28:29,131 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 373 transitions. Word has length 19 [2021-05-22 02:28:29,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:29,131 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 373 transitions. [2021-05-22 02:28:29,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:29,132 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 373 transitions. [2021-05-22 02:28:29,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:29,132 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:29,132 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:29,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3533,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:29,332 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:29,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:29,332 INFO L82 PathProgramCache]: Analyzing trace with hash -123326396, now seen corresponding path program 484 times [2021-05-22 02:28:29,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:29,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920534040] [2021-05-22 02:28:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:29,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:29,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920534040] [2021-05-22 02:28:29,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920534040] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:29,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420259316] [2021-05-22 02:28:29,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:29,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:28:29,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:29,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:29,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:29,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420259316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:29,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:29,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:28:29,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645007581] [2021-05-22 02:28:29,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:28:29,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:29,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:28:29,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:29,601 INFO L87 Difference]: Start difference. First operand 175 states and 373 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:29,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:29,877 INFO L93 Difference]: Finished difference Result 213 states and 444 transitions. [2021-05-22 02:28:29,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:28:29,877 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:29,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:29,878 INFO L225 Difference]: With dead ends: 213 [2021-05-22 02:28:29,878 INFO L226 Difference]: Without dead ends: 213 [2021-05-22 02:28:29,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 293.6ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-22 02:28:29,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-22 02:28:29,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 167. [2021-05-22 02:28:29,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1265060240963853) internal successors, (353), 166 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 353 transitions. [2021-05-22 02:28:29,879 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 353 transitions. Word has length 19 [2021-05-22 02:28:29,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:29,880 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 353 transitions. [2021-05-22 02:28:29,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 353 transitions. [2021-05-22 02:28:29,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:29,880 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:29,880 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:30,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3538,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:30,080 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:30,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:30,080 INFO L82 PathProgramCache]: Analyzing trace with hash 48244001, now seen corresponding path program 485 times [2021-05-22 02:28:30,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:30,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86729238] [2021-05-22 02:28:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:30,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:30,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86729238] [2021-05-22 02:28:30,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86729238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:30,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165443846] [2021-05-22 02:28:30,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:30,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:28:30,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:30,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:30,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:30,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165443846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:30,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:30,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:30,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173550859] [2021-05-22 02:28:30,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:30,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:30,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:30,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:30,441 INFO L87 Difference]: Start difference. First operand 167 states and 353 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:30,870 INFO L93 Difference]: Finished difference Result 185 states and 381 transitions. [2021-05-22 02:28:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:28:30,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:30,870 INFO L225 Difference]: With dead ends: 185 [2021-05-22 02:28:30,870 INFO L226 Difference]: Without dead ends: 173 [2021-05-22 02:28:30,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 555.1ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:28:30,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-22 02:28:30,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 168. [2021-05-22 02:28:30,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1077844311377247) internal successors, (352), 167 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:30,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 352 transitions. [2021-05-22 02:28:30,872 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 352 transitions. Word has length 19 [2021-05-22 02:28:30,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:30,872 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 352 transitions. [2021-05-22 02:28:30,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:30,872 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 352 transitions. [2021-05-22 02:28:30,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:30,872 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:30,872 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:31,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3543,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:31,073 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:31,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:31,073 INFO L82 PathProgramCache]: Analyzing trace with hash 335794236, now seen corresponding path program 486 times [2021-05-22 02:28:31,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:31,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328938352] [2021-05-22 02:28:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:31,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:31,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328938352] [2021-05-22 02:28:31,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328938352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:31,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056147479] [2021-05-22 02:28:31,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:31,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:28:31,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:31,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:31,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:31,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056147479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:31,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:31,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:31,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57151840] [2021-05-22 02:28:31,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:31,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:31,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:31,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:31,369 INFO L87 Difference]: Start difference. First operand 168 states and 352 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:32,007 INFO L93 Difference]: Finished difference Result 231 states and 460 transitions. [2021-05-22 02:28:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:28:32,008 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:32,008 INFO L225 Difference]: With dead ends: 231 [2021-05-22 02:28:32,008 INFO L226 Difference]: Without dead ends: 231 [2021-05-22 02:28:32,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 644.1ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:28:32,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-22 02:28:32,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 173. [2021-05-22 02:28:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.13953488372093) internal successors, (368), 172 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 368 transitions. [2021-05-22 02:28:32,010 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 368 transitions. Word has length 19 [2021-05-22 02:28:32,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:32,010 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 368 transitions. [2021-05-22 02:28:32,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:32,010 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 368 transitions. [2021-05-22 02:28:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:32,010 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:32,010 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:32,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3551 [2021-05-22 02:28:32,210 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:32,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:32,211 INFO L82 PathProgramCache]: Analyzing trace with hash 637784516, now seen corresponding path program 487 times [2021-05-22 02:28:32,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:32,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559600686] [2021-05-22 02:28:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:32,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:32,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559600686] [2021-05-22 02:28:32,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559600686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:32,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941982166] [2021-05-22 02:28:32,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:32,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:32,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:32,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941982166] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:32,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:32,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:32,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488397024] [2021-05-22 02:28:32,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:32,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:32,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:32,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:32,503 INFO L87 Difference]: Start difference. First operand 173 states and 368 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:32,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:32,852 INFO L93 Difference]: Finished difference Result 205 states and 428 transitions. [2021-05-22 02:28:32,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:28:32,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:32,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:32,852 INFO L225 Difference]: With dead ends: 205 [2021-05-22 02:28:32,852 INFO L226 Difference]: Without dead ends: 205 [2021-05-22 02:28:32,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 380.0ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:28:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-22 02:28:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 172. [2021-05-22 02:28:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.1403508771929824) internal successors, (366), 171 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 366 transitions. [2021-05-22 02:28:32,854 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 366 transitions. Word has length 19 [2021-05-22 02:28:32,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:32,854 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 366 transitions. [2021-05-22 02:28:32,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:32,854 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 366 transitions. [2021-05-22 02:28:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:32,854 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:32,855 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:33,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3558 [2021-05-22 02:28:33,055 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:33,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:33,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1144130782, now seen corresponding path program 488 times [2021-05-22 02:28:33,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:33,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697373951] [2021-05-22 02:28:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:33,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:33,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697373951] [2021-05-22 02:28:33,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697373951] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:33,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383152819] [2021-05-22 02:28:33,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:33,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:28:33,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:33,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:33,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:33,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383152819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:33,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:33,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:33,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789490043] [2021-05-22 02:28:33,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:33,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:33,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:33,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:33,359 INFO L87 Difference]: Start difference. First operand 172 states and 366 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:33,715 INFO L93 Difference]: Finished difference Result 217 states and 453 transitions. [2021-05-22 02:28:33,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:28:33,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:33,715 INFO L225 Difference]: With dead ends: 217 [2021-05-22 02:28:33,715 INFO L226 Difference]: Without dead ends: 217 [2021-05-22 02:28:33,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:28:33,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-22 02:28:33,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 171. [2021-05-22 02:28:33,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1411764705882352) internal successors, (364), 170 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:33,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 364 transitions. [2021-05-22 02:28:33,717 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 364 transitions. Word has length 19 [2021-05-22 02:28:33,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:33,717 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 364 transitions. [2021-05-22 02:28:33,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 364 transitions. [2021-05-22 02:28:33,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:33,718 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:33,718 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:33,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3563,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:33,918 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:33,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:33,918 INFO L82 PathProgramCache]: Analyzing trace with hash -339004156, now seen corresponding path program 489 times [2021-05-22 02:28:33,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:33,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482805521] [2021-05-22 02:28:33,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:33,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:34,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:34,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482805521] [2021-05-22 02:28:34,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482805521] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:34,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483371121] [2021-05-22 02:28:34,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:34,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:28:34,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:34,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:34,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:34,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483371121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:34,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:34,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:34,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156251097] [2021-05-22 02:28:34,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:34,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:34,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:34,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:34,207 INFO L87 Difference]: Start difference. First operand 171 states and 364 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:34,544 INFO L93 Difference]: Finished difference Result 200 states and 415 transitions. [2021-05-22 02:28:34,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:28:34,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:34,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:34,544 INFO L225 Difference]: With dead ends: 200 [2021-05-22 02:28:34,544 INFO L226 Difference]: Without dead ends: 200 [2021-05-22 02:28:34,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 377.7ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:28:34,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-22 02:28:34,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 164. [2021-05-22 02:28:34,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1104294478527605) internal successors, (344), 163 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 344 transitions. [2021-05-22 02:28:34,546 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 344 transitions. Word has length 19 [2021-05-22 02:28:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:34,546 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 344 transitions. [2021-05-22 02:28:34,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 344 transitions. [2021-05-22 02:28:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:34,547 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:34,547 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:34,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3568 [2021-05-22 02:28:34,747 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:34,747 INFO L82 PathProgramCache]: Analyzing trace with hash 472555237, now seen corresponding path program 490 times [2021-05-22 02:28:34,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:34,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225975961] [2021-05-22 02:28:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:34,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:34,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225975961] [2021-05-22 02:28:34,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225975961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:34,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501725190] [2021-05-22 02:28:34,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:34,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:28:34,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:34,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:34,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:35,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501725190] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:35,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:35,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:35,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103054103] [2021-05-22 02:28:35,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:35,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:35,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:35,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:35,108 INFO L87 Difference]: Start difference. First operand 164 states and 344 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:35,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:35,612 INFO L93 Difference]: Finished difference Result 195 states and 398 transitions. [2021-05-22 02:28:35,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-22 02:28:35,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:35,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:35,612 INFO L225 Difference]: With dead ends: 195 [2021-05-22 02:28:35,612 INFO L226 Difference]: Without dead ends: 195 [2021-05-22 02:28:35,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 625.7ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:28:35,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-22 02:28:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 164. [2021-05-22 02:28:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1104294478527605) internal successors, (344), 163 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:35,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 344 transitions. [2021-05-22 02:28:35,614 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 344 transitions. Word has length 19 [2021-05-22 02:28:35,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:35,614 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 344 transitions. [2021-05-22 02:28:35,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:35,614 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 344 transitions. [2021-05-22 02:28:35,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:35,614 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:35,614 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:35,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3573,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:35,815 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:35,815 INFO L82 PathProgramCache]: Analyzing trace with hash 760105472, now seen corresponding path program 491 times [2021-05-22 02:28:35,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:35,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65304567] [2021-05-22 02:28:35,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:35,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:35,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65304567] [2021-05-22 02:28:35,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65304567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:35,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26733502] [2021-05-22 02:28:35,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:35,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:28:35,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:35,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:35,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:36,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26733502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:36,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:36,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:36,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807950126] [2021-05-22 02:28:36,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:36,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:36,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:36,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:36,111 INFO L87 Difference]: Start difference. First operand 164 states and 344 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:36,750 INFO L93 Difference]: Finished difference Result 228 states and 458 transitions. [2021-05-22 02:28:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:28:36,751 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:36,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:36,751 INFO L225 Difference]: With dead ends: 228 [2021-05-22 02:28:36,751 INFO L226 Difference]: Without dead ends: 228 [2021-05-22 02:28:36,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 641.7ms TimeCoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:28:36,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-22 02:28:36,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 168. [2021-05-22 02:28:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1197604790419162) internal successors, (354), 167 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 354 transitions. [2021-05-22 02:28:36,753 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 354 transitions. Word has length 19 [2021-05-22 02:28:36,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:36,753 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 354 transitions. [2021-05-22 02:28:36,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:36,755 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 354 transitions. [2021-05-22 02:28:36,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:36,756 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:36,756 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:36,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3581 [2021-05-22 02:28:36,969 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:36,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:36,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1062095752, now seen corresponding path program 492 times [2021-05-22 02:28:36,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:36,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215520316] [2021-05-22 02:28:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:37,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:37,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215520316] [2021-05-22 02:28:37,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215520316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:37,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175204610] [2021-05-22 02:28:37,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:37,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:28:37,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:37,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:37,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:37,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175204610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:37,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:37,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:37,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193091036] [2021-05-22 02:28:37,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:37,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:37,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:37,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:37,269 INFO L87 Difference]: Start difference. First operand 168 states and 354 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:37,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:37,821 INFO L93 Difference]: Finished difference Result 226 states and 459 transitions. [2021-05-22 02:28:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:28:37,821 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:37,821 INFO L225 Difference]: With dead ends: 226 [2021-05-22 02:28:37,821 INFO L226 Difference]: Without dead ends: 226 [2021-05-22 02:28:37,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 602.1ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:28:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-22 02:28:37,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 167. [2021-05-22 02:28:37,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1204819277108435) internal successors, (352), 166 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 352 transitions. [2021-05-22 02:28:37,823 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 352 transitions. Word has length 19 [2021-05-22 02:28:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:37,823 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 352 transitions. [2021-05-22 02:28:37,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 352 transitions. [2021-05-22 02:28:37,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:37,824 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:37,824 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:38,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3588,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:38,024 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:38,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:38,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1568442018, now seen corresponding path program 493 times [2021-05-22 02:28:38,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:38,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78833722] [2021-05-22 02:28:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:38,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:38,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78833722] [2021-05-22 02:28:38,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78833722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:38,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428506785] [2021-05-22 02:28:38,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:38,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:38,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:38,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428506785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:38,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:38,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:38,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770716403] [2021-05-22 02:28:38,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:38,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:38,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:38,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:38,313 INFO L87 Difference]: Start difference. First operand 167 states and 352 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:38,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:38,889 INFO L93 Difference]: Finished difference Result 238 states and 484 transitions. [2021-05-22 02:28:38,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:28:38,890 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:38,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:38,890 INFO L225 Difference]: With dead ends: 238 [2021-05-22 02:28:38,890 INFO L226 Difference]: Without dead ends: 238 [2021-05-22 02:28:38,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 600.0ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:28:38,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-22 02:28:38,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 166. [2021-05-22 02:28:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.121212121212121) internal successors, (350), 165 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 350 transitions. [2021-05-22 02:28:38,892 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 350 transitions. Word has length 19 [2021-05-22 02:28:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:38,892 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 350 transitions. [2021-05-22 02:28:38,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 350 transitions. [2021-05-22 02:28:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:38,892 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:38,892 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:39,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3593 [2021-05-22 02:28:39,094 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:39,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:39,094 INFO L82 PathProgramCache]: Analyzing trace with hash 85307080, now seen corresponding path program 494 times [2021-05-22 02:28:39,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:39,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367789756] [2021-05-22 02:28:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:39,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:39,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367789756] [2021-05-22 02:28:39,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367789756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:39,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884726312] [2021-05-22 02:28:39,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:39,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:28:39,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:39,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:28:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:39,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884726312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:39,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:39,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:28:39,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538598111] [2021-05-22 02:28:39,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:28:39,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:39,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:28:39,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:28:39,368 INFO L87 Difference]: Start difference. First operand 166 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:39,921 INFO L93 Difference]: Finished difference Result 250 states and 509 transitions. [2021-05-22 02:28:39,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:28:39,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:39,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:39,921 INFO L225 Difference]: With dead ends: 250 [2021-05-22 02:28:39,921 INFO L226 Difference]: Without dead ends: 250 [2021-05-22 02:28:39,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 557.3ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:28:39,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-22 02:28:39,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 165. [2021-05-22 02:28:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1219512195121952) internal successors, (348), 164 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:39,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 348 transitions. [2021-05-22 02:28:39,923 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 348 transitions. Word has length 19 [2021-05-22 02:28:39,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:39,923 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 348 transitions. [2021-05-22 02:28:39,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:39,923 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 348 transitions. [2021-05-22 02:28:39,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-22 02:28:39,924 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:39,924 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:40,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:40,124 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:40,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:40,124 INFO L82 PathProgramCache]: Analyzing trace with hash 930278532, now seen corresponding path program 495 times [2021-05-22 02:28:40,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:40,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823708452] [2021-05-22 02:28:40,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:40,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:40,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823708452] [2021-05-22 02:28:40,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823708452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:40,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532542465] [2021-05-22 02:28:40,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:40,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:28:40,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:40,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:28:40,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:40,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532542465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:40,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:40,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-22 02:28:40,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882411073] [2021-05-22 02:28:40,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-22 02:28:40,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:40,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-22 02:28:40,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-22 02:28:40,345 INFO L87 Difference]: Start difference. First operand 165 states and 348 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:40,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:40,471 INFO L93 Difference]: Finished difference Result 219 states and 444 transitions. [2021-05-22 02:28:40,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-22 02:28:40,471 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-22 02:28:40,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:40,471 INFO L225 Difference]: With dead ends: 219 [2021-05-22 02:28:40,471 INFO L226 Difference]: Without dead ends: 219 [2021-05-22 02:28:40,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:28:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-22 02:28:40,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 159. [2021-05-22 02:28:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1012658227848102) internal successors, (332), 158 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 332 transitions. [2021-05-22 02:28:40,473 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 332 transitions. Word has length 19 [2021-05-22 02:28:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:40,473 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 332 transitions. [2021-05-22 02:28:40,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 332 transitions. [2021-05-22 02:28:40,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:28:40,473 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:40,473 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:40,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3603,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:40,674 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:40,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:40,674 INFO L82 PathProgramCache]: Analyzing trace with hash 313289047, now seen corresponding path program 496 times [2021-05-22 02:28:40,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:40,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137767859] [2021-05-22 02:28:40,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:40,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:40,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137767859] [2021-05-22 02:28:40,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137767859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:40,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159546313] [2021-05-22 02:28:40,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:40,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:28:40,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:40,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:28:40,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:41,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159546313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:41,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:41,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:28:41,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277502255] [2021-05-22 02:28:41,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:28:41,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:41,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:28:41,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:28:41,351 INFO L87 Difference]: Start difference. First operand 159 states and 332 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:41,894 INFO L93 Difference]: Finished difference Result 250 states and 493 transitions. [2021-05-22 02:28:41,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:28:41,894 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:28:41,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:41,894 INFO L225 Difference]: With dead ends: 250 [2021-05-22 02:28:41,894 INFO L226 Difference]: Without dead ends: 231 [2021-05-22 02:28:41,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 871.4ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:28:41,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-22 02:28:41,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2021-05-22 02:28:41,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.10062893081761) internal successors, (334), 159 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:41,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 334 transitions. [2021-05-22 02:28:41,896 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 334 transitions. Word has length 20 [2021-05-22 02:28:41,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:41,896 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 334 transitions. [2021-05-22 02:28:41,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:41,896 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 334 transitions. [2021-05-22 02:28:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:28:41,896 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:41,896 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:42,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3608 [2021-05-22 02:28:42,097 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:42,097 INFO L82 PathProgramCache]: Analyzing trace with hash -2044100551, now seen corresponding path program 497 times [2021-05-22 02:28:42,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:42,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159516012] [2021-05-22 02:28:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:42,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:42,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159516012] [2021-05-22 02:28:42,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159516012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:42,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225746683] [2021-05-22 02:28:42,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:42,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:28:42,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:42,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:28:42,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:42,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225746683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:42,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:42,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:28:42,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67365406] [2021-05-22 02:28:42,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:28:42,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:42,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:28:42,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:28:42,750 INFO L87 Difference]: Start difference. First operand 160 states and 334 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:43,986 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-05-22 02:28:44,269 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 74 [2021-05-22 02:28:44,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:44,317 INFO L93 Difference]: Finished difference Result 282 states and 567 transitions. [2021-05-22 02:28:44,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:28:44,317 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:28:44,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:44,318 INFO L225 Difference]: With dead ends: 282 [2021-05-22 02:28:44,318 INFO L226 Difference]: Without dead ends: 258 [2021-05-22 02:28:44,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1713.2ms TimeCoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:28:44,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-22 02:28:44,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 164. [2021-05-22 02:28:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1165644171779143) internal successors, (345), 163 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 345 transitions. [2021-05-22 02:28:44,320 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 345 transitions. Word has length 20 [2021-05-22 02:28:44,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:44,320 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 345 transitions. [2021-05-22 02:28:44,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 345 transitions. [2021-05-22 02:28:44,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:28:44,320 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:44,320 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:44,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3620,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:44,520 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:44,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:44,521 INFO L82 PathProgramCache]: Analyzing trace with hash -983322461, now seen corresponding path program 498 times [2021-05-22 02:28:44,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:44,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564267454] [2021-05-22 02:28:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:44,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:44,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564267454] [2021-05-22 02:28:44,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564267454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:44,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038700183] [2021-05-22 02:28:44,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:44,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:28:44,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:44,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:28:44,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:45,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038700183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:45,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:45,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:28:45,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297081955] [2021-05-22 02:28:45,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:28:45,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:45,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:28:45,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:28:45,176 INFO L87 Difference]: Start difference. First operand 164 states and 345 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:45,963 INFO L93 Difference]: Finished difference Result 214 states and 421 transitions. [2021-05-22 02:28:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:28:45,963 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:28:45,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:45,964 INFO L225 Difference]: With dead ends: 214 [2021-05-22 02:28:45,964 INFO L226 Difference]: Without dead ends: 197 [2021-05-22 02:28:45,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1079.6ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:28:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-22 02:28:45,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 166. [2021-05-22 02:28:45,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.1151515151515152) internal successors, (349), 165 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 349 transitions. [2021-05-22 02:28:45,965 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 349 transitions. Word has length 20 [2021-05-22 02:28:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:45,966 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 349 transitions. [2021-05-22 02:28:45,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 349 transitions. [2021-05-22 02:28:45,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:28:45,966 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:45,966 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:46,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:46,166 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:46,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:46,167 INFO L82 PathProgramCache]: Analyzing trace with hash -685269503, now seen corresponding path program 499 times [2021-05-22 02:28:46,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:46,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305511672] [2021-05-22 02:28:46,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:46,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:46,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305511672] [2021-05-22 02:28:46,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305511672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:46,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931931534] [2021-05-22 02:28:46,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:46,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:46,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:28:46,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:46,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931931534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:46,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:46,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:28:46,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85341271] [2021-05-22 02:28:46,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:28:46,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:46,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:28:46,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:28:46,809 INFO L87 Difference]: Start difference. First operand 166 states and 349 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:47,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:47,785 INFO L93 Difference]: Finished difference Result 231 states and 458 transitions. [2021-05-22 02:28:47,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:28:47,785 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:28:47,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:47,785 INFO L225 Difference]: With dead ends: 231 [2021-05-22 02:28:47,785 INFO L226 Difference]: Without dead ends: 224 [2021-05-22 02:28:47,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1108.0ms TimeCoverageRelationStatistics Valid=149, Invalid=1573, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:28:47,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-22 02:28:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 167. [2021-05-22 02:28:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1204819277108435) internal successors, (352), 166 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 352 transitions. [2021-05-22 02:28:47,787 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 352 transitions. Word has length 20 [2021-05-22 02:28:47,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:47,787 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 352 transitions. [2021-05-22 02:28:47,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:47,787 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 352 transitions. [2021-05-22 02:28:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:28:47,787 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:47,788 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:47,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3644 [2021-05-22 02:28:47,988 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:47,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:47,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1956744419, now seen corresponding path program 500 times [2021-05-22 02:28:47,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:47,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872024866] [2021-05-22 02:28:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:48,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:48,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872024866] [2021-05-22 02:28:48,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872024866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:48,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005908950] [2021-05-22 02:28:48,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:48,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:28:48,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:48,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-22 02:28:48,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:48,523 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-05-22 02:28:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:48,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005908950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:48,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:48,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:28:48,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889432580] [2021-05-22 02:28:48,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:28:48,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:48,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:28:48,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:28:48,832 INFO L87 Difference]: Start difference. First operand 167 states and 352 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:49,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:49,711 INFO L93 Difference]: Finished difference Result 221 states and 433 transitions. [2021-05-22 02:28:49,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:28:49,711 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:28:49,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:49,711 INFO L225 Difference]: With dead ends: 221 [2021-05-22 02:28:49,711 INFO L226 Difference]: Without dead ends: 200 [2021-05-22 02:28:49,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1247.4ms TimeCoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:28:49,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-22 02:28:49,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 168. [2021-05-22 02:28:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1137724550898205) internal successors, (353), 167 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 353 transitions. [2021-05-22 02:28:49,713 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 353 transitions. Word has length 20 [2021-05-22 02:28:49,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:49,713 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 353 transitions. [2021-05-22 02:28:49,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:49,713 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 353 transitions. [2021-05-22 02:28:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:28:49,713 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:49,713 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:49,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3659,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:49,914 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:49,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:49,914 INFO L82 PathProgramCache]: Analyzing trace with hash 379402689, now seen corresponding path program 501 times [2021-05-22 02:28:49,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:49,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963397323] [2021-05-22 02:28:49,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:50,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:50,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963397323] [2021-05-22 02:28:50,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963397323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:50,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580499849] [2021-05-22 02:28:50,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:50,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:28:50,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:50,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-22 02:28:50,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:50,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580499849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:50,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:50,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:28:50,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650323651] [2021-05-22 02:28:50,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:28:50,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:50,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:28:50,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:28:50,627 INFO L87 Difference]: Start difference. First operand 168 states and 353 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:51,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:51,813 INFO L93 Difference]: Finished difference Result 250 states and 485 transitions. [2021-05-22 02:28:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:28:51,814 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:28:51,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:51,814 INFO L225 Difference]: With dead ends: 250 [2021-05-22 02:28:51,814 INFO L226 Difference]: Without dead ends: 232 [2021-05-22 02:28:51,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1405.0ms TimeCoverageRelationStatistics Valid=166, Invalid=1394, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:28:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-22 02:28:51,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 172. [2021-05-22 02:28:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.128654970760234) internal successors, (364), 171 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 364 transitions. [2021-05-22 02:28:51,816 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 364 transitions. Word has length 20 [2021-05-22 02:28:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:51,816 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 364 transitions. [2021-05-22 02:28:51,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 364 transitions. [2021-05-22 02:28:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:28:51,816 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:51,816 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:52,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-05-22 02:28:52,028 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:52,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:52,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1713994019, now seen corresponding path program 502 times [2021-05-22 02:28:52,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:52,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779126346] [2021-05-22 02:28:52,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:52,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:52,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779126346] [2021-05-22 02:28:52,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779126346] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:52,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697619653] [2021-05-22 02:28:52,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:52,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:28:52,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:52,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:28:52,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:52,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697619653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:52,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:52,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:28:52,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373878622] [2021-05-22 02:28:52,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:28:52,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:52,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:28:52,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:28:52,722 INFO L87 Difference]: Start difference. First operand 172 states and 364 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:54,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:54,044 INFO L93 Difference]: Finished difference Result 250 states and 481 transitions. [2021-05-22 02:28:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:28:54,044 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:28:54,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:54,044 INFO L225 Difference]: With dead ends: 250 [2021-05-22 02:28:54,044 INFO L226 Difference]: Without dead ends: 227 [2021-05-22 02:28:54,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1484.1ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:28:54,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-22 02:28:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 171. [2021-05-22 02:28:54,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1176470588235294) internal successors, (360), 170 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 360 transitions. [2021-05-22 02:28:54,046 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 360 transitions. Word has length 20 [2021-05-22 02:28:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:54,046 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 360 transitions. [2021-05-22 02:28:54,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 360 transitions. [2021-05-22 02:28:54,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:28:54,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:54,047 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:54,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3684,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:54,247 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:54,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:54,247 INFO L82 PathProgramCache]: Analyzing trace with hash 582187675, now seen corresponding path program 503 times [2021-05-22 02:28:54,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:54,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357644911] [2021-05-22 02:28:54,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:54,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:54,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357644911] [2021-05-22 02:28:54,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357644911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:54,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525093973] [2021-05-22 02:28:54,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:54,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:28:54,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:54,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:28:54,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:54,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525093973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:54,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:54,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:28:54,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062970214] [2021-05-22 02:28:54,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:28:54,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:54,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:28:54,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:28:54,962 INFO L87 Difference]: Start difference. First operand 171 states and 360 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:55,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:55,783 INFO L93 Difference]: Finished difference Result 220 states and 435 transitions. [2021-05-22 02:28:55,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:28:55,784 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:28:55,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:55,784 INFO L225 Difference]: With dead ends: 220 [2021-05-22 02:28:55,784 INFO L226 Difference]: Without dead ends: 205 [2021-05-22 02:28:55,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1091.8ms TimeCoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:28:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-22 02:28:55,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 175. [2021-05-22 02:28:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1149425287356323) internal successors, (368), 174 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:55,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 368 transitions. [2021-05-22 02:28:55,786 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 368 transitions. Word has length 20 [2021-05-22 02:28:55,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:55,786 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 368 transitions. [2021-05-22 02:28:55,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:55,786 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 368 transitions. [2021-05-22 02:28:55,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:28:55,786 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:55,786 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:55,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3696,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:55,986 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:55,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:55,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1070765699, now seen corresponding path program 504 times [2021-05-22 02:28:55,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:55,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233473974] [2021-05-22 02:28:55,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:56,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:56,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233473974] [2021-05-22 02:28:56,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233473974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:56,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679458675] [2021-05-22 02:28:56,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:56,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:28:56,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:28:56,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:28:56,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:56,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679458675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:56,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:56,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:28:56,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990514319] [2021-05-22 02:28:56,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:28:56,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:56,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:28:56,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:28:56,735 INFO L87 Difference]: Start difference. First operand 175 states and 368 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:57,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:28:57,541 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2021-05-22 02:28:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:28:57,541 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:28:57,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:28:57,542 INFO L225 Difference]: With dead ends: 220 [2021-05-22 02:28:57,542 INFO L226 Difference]: Without dead ends: 207 [2021-05-22 02:28:57,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1147.8ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:28:57,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-22 02:28:57,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 176. [2021-05-22 02:28:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1142857142857143) internal successors, (370), 175 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 370 transitions. [2021-05-22 02:28:57,543 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 370 transitions. Word has length 20 [2021-05-22 02:28:57,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:28:57,543 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 370 transitions. [2021-05-22 02:28:57,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 370 transitions. [2021-05-22 02:28:57,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:28:57,544 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:28:57,544 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:28:57,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3708 [2021-05-22 02:28:57,744 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:28:57,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:28:57,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1646859867, now seen corresponding path program 505 times [2021-05-22 02:28:57,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:28:57,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902610339] [2021-05-22 02:28:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:28:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:58,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:28:58,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902610339] [2021-05-22 02:28:58,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902610339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:58,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866681233] [2021-05-22 02:28:58,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:28:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:28:58,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:28:58,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:28:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:28:58,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866681233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:28:58,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:28:58,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:28:58,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536237305] [2021-05-22 02:28:58,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:28:58,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:28:58,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:28:58,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:28:58,519 INFO L87 Difference]: Start difference. First operand 176 states and 370 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:28:59,497 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-05-22 02:28:59,689 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2021-05-22 02:28:59,862 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2021-05-22 02:29:00,114 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-05-22 02:29:00,389 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-05-22 02:29:00,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:00,600 INFO L93 Difference]: Finished difference Result 280 states and 546 transitions. [2021-05-22 02:29:00,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:29:00,600 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:00,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:00,601 INFO L225 Difference]: With dead ends: 280 [2021-05-22 02:29:00,601 INFO L226 Difference]: Without dead ends: 262 [2021-05-22 02:29:00,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2312.6ms TimeCoverageRelationStatistics Valid=261, Invalid=2189, Unknown=0, NotChecked=0, Total=2450 [2021-05-22 02:29:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-22 02:29:00,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 182. [2021-05-22 02:29:00,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.149171270718232) internal successors, (389), 181 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 389 transitions. [2021-05-22 02:29:00,603 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 389 transitions. Word has length 20 [2021-05-22 02:29:00,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:00,603 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 389 transitions. [2021-05-22 02:29:00,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:00,603 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 389 transitions. [2021-05-22 02:29:00,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:00,603 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:00,603 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:00,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3720,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:00,809 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:00,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:00,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1313516099, now seen corresponding path program 506 times [2021-05-22 02:29:00,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:00,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924636246] [2021-05-22 02:29:00,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:01,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:01,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924636246] [2021-05-22 02:29:01,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924636246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:01,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460719951] [2021-05-22 02:29:01,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:01,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:29:01,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:01,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:01,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:01,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460719951] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:01,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:01,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:29:01,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623566336] [2021-05-22 02:29:01,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:29:01,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:01,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:29:01,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:29:01,546 INFO L87 Difference]: Start difference. First operand 182 states and 389 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:02,616 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-05-22 02:29:02,784 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-05-22 02:29:02,975 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-05-22 02:29:03,099 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-05-22 02:29:03,276 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-05-22 02:29:03,469 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-05-22 02:29:03,607 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-05-22 02:29:03,743 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-05-22 02:29:04,235 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2021-05-22 02:29:04,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:04,346 INFO L93 Difference]: Finished difference Result 307 states and 587 transitions. [2021-05-22 02:29:04,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-22 02:29:04,346 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:04,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:04,347 INFO L225 Difference]: With dead ends: 307 [2021-05-22 02:29:04,347 INFO L226 Difference]: Without dead ends: 288 [2021-05-22 02:29:04,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2936.2ms TimeCoverageRelationStatistics Valid=342, Invalid=2628, Unknown=0, NotChecked=0, Total=2970 [2021-05-22 02:29:04,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-05-22 02:29:04,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 182. [2021-05-22 02:29:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.154696132596685) internal successors, (390), 181 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:04,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 390 transitions. [2021-05-22 02:29:04,349 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 390 transitions. Word has length 20 [2021-05-22 02:29:04,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:04,349 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 390 transitions. [2021-05-22 02:29:04,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:04,349 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 390 transitions. [2021-05-22 02:29:04,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:04,349 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:04,349 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:04,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3732,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:04,550 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:04,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:04,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1741066659, now seen corresponding path program 507 times [2021-05-22 02:29:04,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:04,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394138648] [2021-05-22 02:29:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:04,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:04,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394138648] [2021-05-22 02:29:04,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394138648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:04,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458478349] [2021-05-22 02:29:04,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:04,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:29:04,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:04,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:04,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:05,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458478349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:05,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:05,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:29:05,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572222658] [2021-05-22 02:29:05,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:29:05,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:05,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:29:05,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:29:05,245 INFO L87 Difference]: Start difference. First operand 182 states and 390 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:06,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:06,191 INFO L93 Difference]: Finished difference Result 229 states and 462 transitions. [2021-05-22 02:29:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:29:06,192 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:06,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:06,192 INFO L225 Difference]: With dead ends: 229 [2021-05-22 02:29:06,192 INFO L226 Difference]: Without dead ends: 216 [2021-05-22 02:29:06,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1222.8ms TimeCoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:29:06,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-22 02:29:06,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 184. [2021-05-22 02:29:06,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1530054644808745) internal successors, (394), 183 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:06,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 394 transitions. [2021-05-22 02:29:06,194 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 394 transitions. Word has length 20 [2021-05-22 02:29:06,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:06,194 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 394 transitions. [2021-05-22 02:29:06,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:06,194 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 394 transitions. [2021-05-22 02:29:06,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:06,194 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:06,194 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:06,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3745,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:06,395 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:06,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:06,395 INFO L82 PathProgramCache]: Analyzing trace with hash 163724929, now seen corresponding path program 508 times [2021-05-22 02:29:06,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:06,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489551530] [2021-05-22 02:29:06,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:06,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:06,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489551530] [2021-05-22 02:29:06,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489551530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:06,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136745882] [2021-05-22 02:29:06,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:06,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:29:06,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:06,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:29:06,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:07,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136745882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:07,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:07,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:29:07,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251127960] [2021-05-22 02:29:07,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:29:07,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:07,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:29:07,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:29:07,078 INFO L87 Difference]: Start difference. First operand 184 states and 394 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:08,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:08,770 INFO L93 Difference]: Finished difference Result 256 states and 512 transitions. [2021-05-22 02:29:08,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:29:08,770 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:08,770 INFO L225 Difference]: With dead ends: 256 [2021-05-22 02:29:08,770 INFO L226 Difference]: Without dead ends: 242 [2021-05-22 02:29:08,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1780.7ms TimeCoverageRelationStatistics Valid=224, Invalid=2326, Unknown=0, NotChecked=0, Total=2550 [2021-05-22 02:29:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-22 02:29:08,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 186. [2021-05-22 02:29:08,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.1675675675675676) internal successors, (401), 185 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:08,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 401 transitions. [2021-05-22 02:29:08,772 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 401 transitions. Word has length 20 [2021-05-22 02:29:08,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:08,772 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 401 transitions. [2021-05-22 02:29:08,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:08,772 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 401 transitions. [2021-05-22 02:29:08,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:08,773 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:08,773 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:08,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3757 [2021-05-22 02:29:08,973 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:08,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:08,973 INFO L82 PathProgramCache]: Analyzing trace with hash 670071195, now seen corresponding path program 509 times [2021-05-22 02:29:08,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:08,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842117961] [2021-05-22 02:29:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:09,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:09,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842117961] [2021-05-22 02:29:09,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842117961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:09,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18893513] [2021-05-22 02:29:09,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:09,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:29:09,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:09,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:09,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:09,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18893513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:09,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:09,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:29:09,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124228244] [2021-05-22 02:29:09,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:29:09,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:09,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:29:09,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:29:09,692 INFO L87 Difference]: Start difference. First operand 186 states and 401 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:10,999 INFO L93 Difference]: Finished difference Result 258 states and 517 transitions. [2021-05-22 02:29:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:29:11,000 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:11,000 INFO L225 Difference]: With dead ends: 258 [2021-05-22 02:29:11,000 INFO L226 Difference]: Without dead ends: 240 [2021-05-22 02:29:11,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1499.4ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-05-22 02:29:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-22 02:29:11,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 188. [2021-05-22 02:29:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.165775401069519) internal successors, (405), 187 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 405 transitions. [2021-05-22 02:29:11,002 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 405 transitions. Word has length 20 [2021-05-22 02:29:11,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:11,002 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 405 transitions. [2021-05-22 02:29:11,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 405 transitions. [2021-05-22 02:29:11,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:11,003 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:11,003 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:11,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3772,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:11,203 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:11,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:11,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1466806947, now seen corresponding path program 510 times [2021-05-22 02:29:11,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:11,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280063043] [2021-05-22 02:29:11,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:11,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:11,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280063043] [2021-05-22 02:29:11,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280063043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:11,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081820947] [2021-05-22 02:29:11,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:11,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:29:11,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:11,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:29:11,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:11,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081820947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:11,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:11,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:29:11,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294006572] [2021-05-22 02:29:11,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:29:11,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:11,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:29:11,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:29:11,803 INFO L87 Difference]: Start difference. First operand 188 states and 405 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:14,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:14,133 INFO L93 Difference]: Finished difference Result 312 states and 610 transitions. [2021-05-22 02:29:14,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-22 02:29:14,134 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:14,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:14,134 INFO L225 Difference]: With dead ends: 312 [2021-05-22 02:29:14,134 INFO L226 Difference]: Without dead ends: 280 [2021-05-22 02:29:14,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2343.1ms TimeCoverageRelationStatistics Valid=437, Invalid=3985, Unknown=0, NotChecked=0, Total=4422 [2021-05-22 02:29:14,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-22 02:29:14,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 198. [2021-05-22 02:29:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1624365482233503) internal successors, (426), 197 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 426 transitions. [2021-05-22 02:29:14,136 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 426 transitions. Word has length 20 [2021-05-22 02:29:14,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:14,136 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 426 transitions. [2021-05-22 02:29:14,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:14,136 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 426 transitions. [2021-05-22 02:29:14,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:14,137 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:14,137 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:14,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3784,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:14,337 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:14,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1836027257, now seen corresponding path program 511 times [2021-05-22 02:29:14,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:14,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795345480] [2021-05-22 02:29:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:14,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:14,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795345480] [2021-05-22 02:29:14,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795345480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:14,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310353127] [2021-05-22 02:29:14,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:14,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:29:14,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:15,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310353127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:15,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:15,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:29:15,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921793164] [2021-05-22 02:29:15,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:29:15,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:15,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:29:15,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:29:15,036 INFO L87 Difference]: Start difference. First operand 198 states and 426 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:15,723 INFO L93 Difference]: Finished difference Result 222 states and 462 transitions. [2021-05-22 02:29:15,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:29:15,723 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:15,723 INFO L225 Difference]: With dead ends: 222 [2021-05-22 02:29:15,723 INFO L226 Difference]: Without dead ends: 205 [2021-05-22 02:29:15,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1052.3ms TimeCoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:29:15,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-22 02:29:15,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 199. [2021-05-22 02:29:15,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.1616161616161618) internal successors, (428), 198 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 428 transitions. [2021-05-22 02:29:15,725 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 428 transitions. Word has length 20 [2021-05-22 02:29:15,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:15,725 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 428 transitions. [2021-05-22 02:29:15,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:15,725 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 428 transitions. [2021-05-22 02:29:15,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:15,725 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:15,725 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:15,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3798 [2021-05-22 02:29:15,926 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:15,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:15,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2134080215, now seen corresponding path program 512 times [2021-05-22 02:29:15,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:15,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136808492] [2021-05-22 02:29:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:16,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136808492] [2021-05-22 02:29:16,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136808492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995260105] [2021-05-22 02:29:16,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:16,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:29:16,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:16,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:16,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:16,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995260105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:16,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:16,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:29:16,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678699227] [2021-05-22 02:29:16,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:29:16,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:16,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:29:16,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:29:16,687 INFO L87 Difference]: Start difference. First operand 199 states and 428 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:17,457 INFO L93 Difference]: Finished difference Result 221 states and 461 transitions. [2021-05-22 02:29:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:29:17,457 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:17,457 INFO L225 Difference]: With dead ends: 221 [2021-05-22 02:29:17,458 INFO L226 Difference]: Without dead ends: 206 [2021-05-22 02:29:17,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1132.8ms TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:29:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-22 02:29:17,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2021-05-22 02:29:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.1608040201005023) internal successors, (430), 199 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:17,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 430 transitions. [2021-05-22 02:29:17,459 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 430 transitions. Word has length 20 [2021-05-22 02:29:17,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:17,459 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 430 transitions. [2021-05-22 02:29:17,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:17,459 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 430 transitions. [2021-05-22 02:29:17,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:17,460 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:17,460 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:17,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3810,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:17,660 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:17,660 INFO L82 PathProgramCache]: Analyzing trace with hash 481126841, now seen corresponding path program 513 times [2021-05-22 02:29:17,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:17,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87918906] [2021-05-22 02:29:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:17,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:17,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87918906] [2021-05-22 02:29:17,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87918906] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:17,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468067699] [2021-05-22 02:29:17,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:17,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:29:17,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:17,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:29:17,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:18,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468067699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:18,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:18,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:29:18,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60896986] [2021-05-22 02:29:18,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:29:18,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:18,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:29:18,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:29:18,448 INFO L87 Difference]: Start difference. First operand 200 states and 430 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:19,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:19,154 INFO L93 Difference]: Finished difference Result 221 states and 462 transitions. [2021-05-22 02:29:19,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:29:19,154 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:19,154 INFO L225 Difference]: With dead ends: 221 [2021-05-22 02:29:19,154 INFO L226 Difference]: Without dead ends: 208 [2021-05-22 02:29:19,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1102.7ms TimeCoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:29:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-22 02:29:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 201. [2021-05-22 02:29:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.16) internal successors, (432), 200 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 432 transitions. [2021-05-22 02:29:19,156 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 432 transitions. Word has length 20 [2021-05-22 02:29:19,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:19,156 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 432 transitions. [2021-05-22 02:29:19,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:19,156 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 432 transitions. [2021-05-22 02:29:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:19,156 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:19,156 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:19,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3822,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:19,357 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:19,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:19,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1096214889, now seen corresponding path program 514 times [2021-05-22 02:29:19,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:19,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158891575] [2021-05-22 02:29:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:19,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:19,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158891575] [2021-05-22 02:29:19,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158891575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:19,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965562723] [2021-05-22 02:29:19,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:19,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:29:19,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:19,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:29:19,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:20,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965562723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:20,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:20,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:29:20,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246609716] [2021-05-22 02:29:20,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:29:20,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:20,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:29:20,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:29:20,165 INFO L87 Difference]: Start difference. First operand 201 states and 432 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:20,872 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-05-22 02:29:21,191 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-05-22 02:29:21,405 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-05-22 02:29:21,722 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2021-05-22 02:29:22,000 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-05-22 02:29:22,131 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-05-22 02:29:22,408 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2021-05-22 02:29:22,678 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-05-22 02:29:22,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:22,719 INFO L93 Difference]: Finished difference Result 280 states and 569 transitions. [2021-05-22 02:29:22,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:29:22,719 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:22,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:22,720 INFO L225 Difference]: With dead ends: 280 [2021-05-22 02:29:22,720 INFO L226 Difference]: Without dead ends: 262 [2021-05-22 02:29:22,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2864.2ms TimeCoverageRelationStatistics Valid=260, Invalid=1996, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:29:22,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-22 02:29:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 207. [2021-05-22 02:29:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.1893203883495147) internal successors, (451), 206 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:22,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 451 transitions. [2021-05-22 02:29:22,722 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 451 transitions. Word has length 20 [2021-05-22 02:29:22,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:22,722 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 451 transitions. [2021-05-22 02:29:22,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:22,722 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 451 transitions. [2021-05-22 02:29:22,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:22,722 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:22,722 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:22,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3834,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:22,923 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:22,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:22,923 INFO L82 PathProgramCache]: Analyzing trace with hash -256963049, now seen corresponding path program 515 times [2021-05-22 02:29:22,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:22,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852959685] [2021-05-22 02:29:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:23,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:23,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852959685] [2021-05-22 02:29:23,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852959685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:23,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553376198] [2021-05-22 02:29:23,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:23,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:29:23,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:23,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:23,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:23,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553376198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:23,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:23,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:23,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419286691] [2021-05-22 02:29:23,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:23,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:23,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:23,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:23,621 INFO L87 Difference]: Start difference. First operand 207 states and 451 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:24,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:24,021 INFO L93 Difference]: Finished difference Result 231 states and 488 transitions. [2021-05-22 02:29:24,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:29:24,021 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:24,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:24,022 INFO L225 Difference]: With dead ends: 231 [2021-05-22 02:29:24,022 INFO L226 Difference]: Without dead ends: 216 [2021-05-22 02:29:24,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 765.9ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:29:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-22 02:29:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 210. [2021-05-22 02:29:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.186602870813397) internal successors, (457), 209 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 457 transitions. [2021-05-22 02:29:24,023 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 457 transitions. Word has length 20 [2021-05-22 02:29:24,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:24,023 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 457 transitions. [2021-05-22 02:29:24,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 457 transitions. [2021-05-22 02:29:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:24,024 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:24,024 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:24,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3846,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:24,224 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:24,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:24,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1909916423, now seen corresponding path program 516 times [2021-05-22 02:29:24,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:24,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942899257] [2021-05-22 02:29:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:24,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:24,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942899257] [2021-05-22 02:29:24,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942899257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:24,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082945244] [2021-05-22 02:29:24,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:24,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:29:24,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:24,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:24,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:24,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082945244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:24,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:24,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:24,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986384120] [2021-05-22 02:29:24,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:24,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:24,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:24,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:24,946 INFO L87 Difference]: Start difference. First operand 210 states and 457 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:25,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:25,432 INFO L93 Difference]: Finished difference Result 231 states and 489 transitions. [2021-05-22 02:29:25,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:29:25,432 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:25,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:25,432 INFO L225 Difference]: With dead ends: 231 [2021-05-22 02:29:25,433 INFO L226 Difference]: Without dead ends: 218 [2021-05-22 02:29:25,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 814.8ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:29:25,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-22 02:29:25,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 211. [2021-05-22 02:29:25,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.1857142857142855) internal successors, (459), 210 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 459 transitions. [2021-05-22 02:29:25,434 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 459 transitions. Word has length 20 [2021-05-22 02:29:25,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:25,434 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 459 transitions. [2021-05-22 02:29:25,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:25,434 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 459 transitions. [2021-05-22 02:29:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:25,435 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:25,435 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:25,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3858 [2021-05-22 02:29:25,635 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:25,635 INFO L82 PathProgramCache]: Analyzing trace with hash 807709143, now seen corresponding path program 517 times [2021-05-22 02:29:25,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:25,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004793772] [2021-05-22 02:29:25,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:25,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:25,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004793772] [2021-05-22 02:29:25,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004793772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:25,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884163231] [2021-05-22 02:29:25,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:25,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:29:25,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:26,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:26,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884163231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:26,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:26,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:26,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795627285] [2021-05-22 02:29:26,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:26,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:26,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:26,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:26,333 INFO L87 Difference]: Start difference. First operand 211 states and 459 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:26,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:26,832 INFO L93 Difference]: Finished difference Result 243 states and 510 transitions. [2021-05-22 02:29:26,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:29:26,832 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:26,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:26,832 INFO L225 Difference]: With dead ends: 243 [2021-05-22 02:29:26,832 INFO L226 Difference]: Without dead ends: 232 [2021-05-22 02:29:26,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 834.2ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:29:26,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-22 02:29:26,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 212. [2021-05-22 02:29:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.184834123222749) internal successors, (461), 211 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:26,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 461 transitions. [2021-05-22 02:29:26,834 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 461 transitions. Word has length 20 [2021-05-22 02:29:26,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:26,834 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 461 transitions. [2021-05-22 02:29:26,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:26,834 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 461 transitions. [2021-05-22 02:29:26,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:26,835 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:26,835 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:27,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 518 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3870 [2021-05-22 02:29:27,035 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:27,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:27,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2142300473, now seen corresponding path program 518 times [2021-05-22 02:29:27,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:27,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221289743] [2021-05-22 02:29:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:27,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:27,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221289743] [2021-05-22 02:29:27,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221289743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:27,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839534313] [2021-05-22 02:29:27,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:27,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:29:27,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:27,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:27,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:27,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839534313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:27,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:27,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:27,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632815528] [2021-05-22 02:29:27,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:27,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:27,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:27,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:27,718 INFO L87 Difference]: Start difference. First operand 212 states and 461 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:28,252 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-05-22 02:29:28,447 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-05-22 02:29:28,720 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-05-22 02:29:29,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:29,393 INFO L93 Difference]: Finished difference Result 341 states and 671 transitions. [2021-05-22 02:29:29,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:29:29,393 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:29,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:29,393 INFO L225 Difference]: With dead ends: 341 [2021-05-22 02:29:29,393 INFO L226 Difference]: Without dead ends: 308 [2021-05-22 02:29:29,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1818.7ms TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:29:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-22 02:29:29,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 215. [2021-05-22 02:29:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2009345794392523) internal successors, (471), 214 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 471 transitions. [2021-05-22 02:29:29,396 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 471 transitions. Word has length 20 [2021-05-22 02:29:29,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:29,396 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 471 transitions. [2021-05-22 02:29:29,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:29,396 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 471 transitions. [2021-05-22 02:29:29,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:29,396 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:29,396 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:29,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3882,519 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:29,596 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:29,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:29,597 INFO L82 PathProgramCache]: Analyzing trace with hash 901915935, now seen corresponding path program 519 times [2021-05-22 02:29:29,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:29,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771220695] [2021-05-22 02:29:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:29,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:29,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771220695] [2021-05-22 02:29:29,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771220695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:29,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943056148] [2021-05-22 02:29:29,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:29,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:29:29,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:29,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:29,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:30,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943056148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:30,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:30,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:30,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20536185] [2021-05-22 02:29:30,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:30,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:30,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:30,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:30,265 INFO L87 Difference]: Start difference. First operand 215 states and 471 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:30,752 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-05-22 02:29:30,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:30,977 INFO L93 Difference]: Finished difference Result 248 states and 523 transitions. [2021-05-22 02:29:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:29:30,977 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:30,978 INFO L225 Difference]: With dead ends: 248 [2021-05-22 02:29:30,978 INFO L226 Difference]: Without dead ends: 241 [2021-05-22 02:29:30,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 991.5ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:29:30,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-22 02:29:30,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 217. [2021-05-22 02:29:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.2037037037037037) internal successors, (476), 216 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 476 transitions. [2021-05-22 02:29:30,980 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 476 transitions. Word has length 20 [2021-05-22 02:29:30,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:30,980 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 476 transitions. [2021-05-22 02:29:30,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:30,980 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 476 transitions. [2021-05-22 02:29:30,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:30,980 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:30,980 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:31,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3895,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:31,180 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:31,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:31,181 INFO L82 PathProgramCache]: Analyzing trace with hash -675425795, now seen corresponding path program 520 times [2021-05-22 02:29:31,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:31,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428724439] [2021-05-22 02:29:31,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:31,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:31,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428724439] [2021-05-22 02:29:31,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428724439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:31,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239465977] [2021-05-22 02:29:31,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:31,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:29:31,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:31,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:29:31,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:31,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239465977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:31,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:31,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:31,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327864956] [2021-05-22 02:29:31,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:31,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:31,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:31,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:31,862 INFO L87 Difference]: Start difference. First operand 217 states and 476 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:32,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:32,533 INFO L93 Difference]: Finished difference Result 254 states and 532 transitions. [2021-05-22 02:29:32,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:29:32,533 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:32,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:32,533 INFO L225 Difference]: With dead ends: 254 [2021-05-22 02:29:32,533 INFO L226 Difference]: Without dead ends: 237 [2021-05-22 02:29:32,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 924.0ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:29:32,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-22 02:29:32,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 218. [2021-05-22 02:29:32,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.19815668202765) internal successors, (477), 217 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 477 transitions. [2021-05-22 02:29:32,535 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 477 transitions. Word has length 20 [2021-05-22 02:29:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:32,535 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 477 transitions. [2021-05-22 02:29:32,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 477 transitions. [2021-05-22 02:29:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:32,536 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:32,536 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:32,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3909,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:32,736 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:32,736 INFO L82 PathProgramCache]: Analyzing trace with hash 659165535, now seen corresponding path program 521 times [2021-05-22 02:29:32,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:32,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460990813] [2021-05-22 02:29:32,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:32,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:32,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460990813] [2021-05-22 02:29:32,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460990813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:32,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376536826] [2021-05-22 02:29:32,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:32,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:29:32,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:32,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:29:32,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:33,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376536826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:33,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:33,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:33,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668020203] [2021-05-22 02:29:33,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:33,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:33,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:33,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:33,340 INFO L87 Difference]: Start difference. First operand 218 states and 477 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:34,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:34,720 INFO L93 Difference]: Finished difference Result 308 states and 630 transitions. [2021-05-22 02:29:34,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:29:34,721 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:34,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:34,721 INFO L225 Difference]: With dead ends: 308 [2021-05-22 02:29:34,721 INFO L226 Difference]: Without dead ends: 276 [2021-05-22 02:29:34,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1527.3ms TimeCoverageRelationStatistics Valid=278, Invalid=1702, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:29:34,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-22 02:29:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 220. [2021-05-22 02:29:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2146118721461185) internal successors, (485), 219 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:34,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 485 transitions. [2021-05-22 02:29:34,723 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 485 transitions. Word has length 20 [2021-05-22 02:29:34,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:34,723 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 485 transitions. [2021-05-22 02:29:34,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 485 transitions. [2021-05-22 02:29:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:34,724 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:34,724 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:34,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3921,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:34,924 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:34,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:34,924 INFO L82 PathProgramCache]: Analyzing trace with hash -169079529, now seen corresponding path program 522 times [2021-05-22 02:29:34,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:34,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734338508] [2021-05-22 02:29:34,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:34,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:35,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:35,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734338508] [2021-05-22 02:29:35,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734338508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:35,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094264407] [2021-05-22 02:29:35,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:35,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:29:35,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:35,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:29:35,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:35,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094264407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:35,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:35,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:35,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306863080] [2021-05-22 02:29:35,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:35,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:35,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:35,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:35,525 INFO L87 Difference]: Start difference. First operand 220 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:36,340 INFO L93 Difference]: Finished difference Result 273 states and 580 transitions. [2021-05-22 02:29:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:29:36,341 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:36,341 INFO L225 Difference]: With dead ends: 273 [2021-05-22 02:29:36,341 INFO L226 Difference]: Without dead ends: 255 [2021-05-22 02:29:36,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 985.8ms TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:29:36,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-22 02:29:36,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 220. [2021-05-22 02:29:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.2146118721461185) internal successors, (485), 219 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:36,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 485 transitions. [2021-05-22 02:29:36,343 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 485 transitions. Word has length 20 [2021-05-22 02:29:36,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:36,343 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 485 transitions. [2021-05-22 02:29:36,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:36,343 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 485 transitions. [2021-05-22 02:29:36,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:36,343 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:36,343 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:36,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3933,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:36,544 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:36,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:36,544 INFO L82 PathProgramCache]: Analyzing trace with hash -212189635, now seen corresponding path program 523 times [2021-05-22 02:29:36,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:36,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395866010] [2021-05-22 02:29:36,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:36,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:36,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:36,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395866010] [2021-05-22 02:29:36,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395866010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:36,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661146913] [2021-05-22 02:29:36,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:36,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:29:36,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:37,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661146913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:37,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:37,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:37,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952864591] [2021-05-22 02:29:37,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:37,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:37,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:37,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:37,082 INFO L87 Difference]: Start difference. First operand 220 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:37,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:37,734 INFO L93 Difference]: Finished difference Result 284 states and 592 transitions. [2021-05-22 02:29:37,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:29:37,734 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:37,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:37,734 INFO L225 Difference]: With dead ends: 284 [2021-05-22 02:29:37,734 INFO L226 Difference]: Without dead ends: 268 [2021-05-22 02:29:37,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 833.4ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:29:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-22 02:29:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 225. [2021-05-22 02:29:37,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.2276785714285716) internal successors, (499), 224 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 499 transitions. [2021-05-22 02:29:37,736 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 499 transitions. Word has length 20 [2021-05-22 02:29:37,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:37,737 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 499 transitions. [2021-05-22 02:29:37,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:37,737 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 499 transitions. [2021-05-22 02:29:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:37,737 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:37,737 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:37,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3945,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:37,937 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:37,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:37,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2125594183, now seen corresponding path program 524 times [2021-05-22 02:29:37,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:37,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887606878] [2021-05-22 02:29:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:38,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:38,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887606878] [2021-05-22 02:29:38,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887606878] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:38,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259853566] [2021-05-22 02:29:38,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:38,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:29:38,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:38,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:38,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259853566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:38,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:38,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:38,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124542276] [2021-05-22 02:29:38,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:38,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:38,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:38,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:38,593 INFO L87 Difference]: Start difference. First operand 225 states and 499 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:38,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:38,918 INFO L93 Difference]: Finished difference Result 247 states and 533 transitions. [2021-05-22 02:29:38,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:29:38,918 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:38,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:38,918 INFO L225 Difference]: With dead ends: 247 [2021-05-22 02:29:38,918 INFO L226 Difference]: Without dead ends: 234 [2021-05-22 02:29:38,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 684.1ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:29:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-22 02:29:38,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 228. [2021-05-22 02:29:38,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.2246696035242293) internal successors, (505), 227 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 505 transitions. [2021-05-22 02:29:38,920 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 505 transitions. Word has length 20 [2021-05-22 02:29:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:38,920 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 505 transitions. [2021-05-22 02:29:38,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 505 transitions. [2021-05-22 02:29:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:38,921 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:38,921 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:39,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3957,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:39,121 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:39,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:39,121 INFO L82 PathProgramCache]: Analyzing trace with hash 592031383, now seen corresponding path program 525 times [2021-05-22 02:29:39,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:39,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673114605] [2021-05-22 02:29:39,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:39,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:39,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673114605] [2021-05-22 02:29:39,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673114605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:39,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256203516] [2021-05-22 02:29:39,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:39,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:29:39,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:39,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:29:39,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:39,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256203516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:39,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:39,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:39,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840482803] [2021-05-22 02:29:39,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:39,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:39,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:39,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:39,817 INFO L87 Difference]: Start difference. First operand 228 states and 505 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:40,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:40,546 INFO L93 Difference]: Finished difference Result 279 states and 585 transitions. [2021-05-22 02:29:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:29:40,546 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:40,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:40,547 INFO L225 Difference]: With dead ends: 279 [2021-05-22 02:29:40,547 INFO L226 Difference]: Without dead ends: 254 [2021-05-22 02:29:40,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 994.4ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:29:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-22 02:29:40,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 228. [2021-05-22 02:29:40,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.2246696035242293) internal successors, (505), 227 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:40,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 505 transitions. [2021-05-22 02:29:40,549 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 505 transitions. Word has length 20 [2021-05-22 02:29:40,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:40,549 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 505 transitions. [2021-05-22 02:29:40,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:40,549 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 505 transitions. [2021-05-22 02:29:40,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:40,549 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:40,549 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:40,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-05-22 02:29:40,749 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:40,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:40,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1098377649, now seen corresponding path program 526 times [2021-05-22 02:29:40,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:40,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088325992] [2021-05-22 02:29:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:40,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:40,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088325992] [2021-05-22 02:29:40,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088325992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:40,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932091080] [2021-05-22 02:29:40,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:41,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:29:41,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:41,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:29:41,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:41,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932091080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:41,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:41,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:41,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413198620] [2021-05-22 02:29:41,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:41,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:41,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:41,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:41,358 INFO L87 Difference]: Start difference. First operand 228 states and 505 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:42,463 INFO L93 Difference]: Finished difference Result 276 states and 586 transitions. [2021-05-22 02:29:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:29:42,464 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:42,464 INFO L225 Difference]: With dead ends: 276 [2021-05-22 02:29:42,464 INFO L226 Difference]: Without dead ends: 258 [2021-05-22 02:29:42,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1302.6ms TimeCoverageRelationStatistics Valid=176, Invalid=1384, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:29:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-22 02:29:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 232. [2021-05-22 02:29:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.220779220779221) internal successors, (513), 231 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 513 transitions. [2021-05-22 02:29:42,466 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 513 transitions. Word has length 20 [2021-05-22 02:29:42,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:42,466 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 513 transitions. [2021-05-22 02:29:42,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:42,466 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 513 transitions. [2021-05-22 02:29:42,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:42,467 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:42,467 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:42,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:42,667 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:42,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:42,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1861998317, now seen corresponding path program 527 times [2021-05-22 02:29:42,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:42,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122975637] [2021-05-22 02:29:42,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:42,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:42,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122975637] [2021-05-22 02:29:42,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122975637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:42,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78075544] [2021-05-22 02:29:42,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:42,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:29:42,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:42,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:42,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:43,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78075544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:43,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:43,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:43,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430607667] [2021-05-22 02:29:43,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:43,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:43,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:43,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:43,257 INFO L87 Difference]: Start difference. First operand 232 states and 513 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:43,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:43,793 INFO L93 Difference]: Finished difference Result 285 states and 598 transitions. [2021-05-22 02:29:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:29:43,793 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:43,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:43,793 INFO L225 Difference]: With dead ends: 285 [2021-05-22 02:29:43,793 INFO L226 Difference]: Without dead ends: 259 [2021-05-22 02:29:43,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 758.5ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:29:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-05-22 02:29:43,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2021-05-22 02:29:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.217948717948718) internal successors, (519), 234 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 519 transitions. [2021-05-22 02:29:43,795 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 519 transitions. Word has length 20 [2021-05-22 02:29:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:43,795 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 519 transitions. [2021-05-22 02:29:43,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:43,796 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 519 transitions. [2021-05-22 02:29:43,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:43,796 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:43,796 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:43,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3996 [2021-05-22 02:29:43,996 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:43,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:43,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1895113401, now seen corresponding path program 528 times [2021-05-22 02:29:43,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:43,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16956937] [2021-05-22 02:29:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:44,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:44,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16956937] [2021-05-22 02:29:44,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16956937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:44,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878078896] [2021-05-22 02:29:44,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:44,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:29:44,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:44,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:44,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:44,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878078896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:44,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:44,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:44,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449498734] [2021-05-22 02:29:44,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:44,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:44,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:44,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:44,544 INFO L87 Difference]: Start difference. First operand 235 states and 519 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:45,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:45,304 INFO L93 Difference]: Finished difference Result 312 states and 656 transitions. [2021-05-22 02:29:45,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:29:45,304 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:45,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:45,304 INFO L225 Difference]: With dead ends: 312 [2021-05-22 02:29:45,304 INFO L226 Difference]: Without dead ends: 293 [2021-05-22 02:29:45,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 883.4ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:29:45,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-22 02:29:45,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 236. [2021-05-22 02:29:45,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.2212765957446807) internal successors, (522), 235 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 522 transitions. [2021-05-22 02:29:45,307 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 522 transitions. Word has length 20 [2021-05-22 02:29:45,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:45,307 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 522 transitions. [2021-05-22 02:29:45,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 522 transitions. [2021-05-22 02:29:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:45,307 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:45,307 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:45,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4009,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:45,508 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:45,508 INFO L82 PathProgramCache]: Analyzing trace with hash -384757289, now seen corresponding path program 529 times [2021-05-22 02:29:45,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:45,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876062701] [2021-05-22 02:29:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:45,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:45,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876062701] [2021-05-22 02:29:45,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876062701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:45,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077822785] [2021-05-22 02:29:45,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:45,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:29:45,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:46,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077822785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:46,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:46,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:46,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961180981] [2021-05-22 02:29:46,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:46,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:46,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:46,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:46,135 INFO L87 Difference]: Start difference. First operand 236 states and 522 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:46,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:46,883 INFO L93 Difference]: Finished difference Result 282 states and 600 transitions. [2021-05-22 02:29:46,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:29:46,883 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:46,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:46,883 INFO L225 Difference]: With dead ends: 282 [2021-05-22 02:29:46,883 INFO L226 Difference]: Without dead ends: 268 [2021-05-22 02:29:46,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 997.7ms TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:29:46,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-22 02:29:46,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 238. [2021-05-22 02:29:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.219409282700422) internal successors, (526), 237 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 526 transitions. [2021-05-22 02:29:46,886 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 526 transitions. Word has length 20 [2021-05-22 02:29:46,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:46,886 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 526 transitions. [2021-05-22 02:29:46,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:46,886 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 526 transitions. [2021-05-22 02:29:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:46,886 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:46,886 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:47,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4021,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:47,086 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:47,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:47,087 INFO L82 PathProgramCache]: Analyzing trace with hash 411978463, now seen corresponding path program 530 times [2021-05-22 02:29:47,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:47,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935845212] [2021-05-22 02:29:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:47,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:47,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935845212] [2021-05-22 02:29:47,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935845212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:47,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773256252] [2021-05-22 02:29:47,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:47,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:29:47,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:47,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:47,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:47,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773256252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:47,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:47,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:47,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484925368] [2021-05-22 02:29:47,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:47,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:47,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:47,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:47,650 INFO L87 Difference]: Start difference. First operand 238 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:48,233 INFO L93 Difference]: Finished difference Result 304 states and 642 transitions. [2021-05-22 02:29:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:29:48,233 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:48,234 INFO L225 Difference]: With dead ends: 304 [2021-05-22 02:29:48,234 INFO L226 Difference]: Without dead ends: 285 [2021-05-22 02:29:48,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 725.6ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:29:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-05-22 02:29:48,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 238. [2021-05-22 02:29:48,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.219409282700422) internal successors, (526), 237 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:48,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 526 transitions. [2021-05-22 02:29:48,236 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 526 transitions. Word has length 20 [2021-05-22 02:29:48,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:48,236 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 526 transitions. [2021-05-22 02:29:48,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 526 transitions. [2021-05-22 02:29:48,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:48,236 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:48,236 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:48,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:48,441 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:48,441 INFO L82 PathProgramCache]: Analyzing trace with hash 918324729, now seen corresponding path program 531 times [2021-05-22 02:29:48,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:48,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774321146] [2021-05-22 02:29:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:48,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:48,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774321146] [2021-05-22 02:29:48,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774321146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:48,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6517034] [2021-05-22 02:29:48,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:48,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:29:48,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:48,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-22 02:29:48,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:49,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6517034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:49,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:49,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:29:49,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681745628] [2021-05-22 02:29:49,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:29:49,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:49,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:29:49,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:29:49,145 INFO L87 Difference]: Start difference. First operand 238 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:49,998 INFO L93 Difference]: Finished difference Result 322 states and 659 transitions. [2021-05-22 02:29:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:29:49,998 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:49,998 INFO L225 Difference]: With dead ends: 322 [2021-05-22 02:29:49,998 INFO L226 Difference]: Without dead ends: 297 [2021-05-22 02:29:49,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1144.4ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:29:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-22 02:29:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 239. [2021-05-22 02:29:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.2184873949579833) internal successors, (528), 238 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 528 transitions. [2021-05-22 02:29:50,000 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 528 transitions. Word has length 20 [2021-05-22 02:29:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:50,000 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 528 transitions. [2021-05-22 02:29:50,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 528 transitions. [2021-05-22 02:29:50,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:50,001 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:50,001 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:50,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:50,205 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash -958444701, now seen corresponding path program 532 times [2021-05-22 02:29:50,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:50,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21642491] [2021-05-22 02:29:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:50,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:50,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21642491] [2021-05-22 02:29:50,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21642491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:50,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650888785] [2021-05-22 02:29:50,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:50,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:29:50,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:50,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:29:50,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:50,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650888785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:50,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:50,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:29:50,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663884987] [2021-05-22 02:29:50,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:29:50,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:50,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:29:50,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:29:50,836 INFO L87 Difference]: Start difference. First operand 239 states and 528 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:51,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:51,717 INFO L93 Difference]: Finished difference Result 268 states and 583 transitions. [2021-05-22 02:29:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:29:51,717 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:51,717 INFO L225 Difference]: With dead ends: 268 [2021-05-22 02:29:51,717 INFO L226 Difference]: Without dead ends: 251 [2021-05-22 02:29:51,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1080.6ms TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:29:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-22 02:29:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 240. [2021-05-22 02:29:51,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.217573221757322) internal successors, (530), 239 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 530 transitions. [2021-05-22 02:29:51,719 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 530 transitions. Word has length 20 [2021-05-22 02:29:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:51,719 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 530 transitions. [2021-05-22 02:29:51,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:51,719 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 530 transitions. [2021-05-22 02:29:51,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:51,720 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:51,720 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:51,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4061 [2021-05-22 02:29:51,920 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:51,920 INFO L82 PathProgramCache]: Analyzing trace with hash -660391743, now seen corresponding path program 533 times [2021-05-22 02:29:51,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:51,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131654377] [2021-05-22 02:29:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:52,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:52,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131654377] [2021-05-22 02:29:52,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131654377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:52,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025211516] [2021-05-22 02:29:52,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:52,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:29:52,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:52,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:52,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:52,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025211516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:52,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:52,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:29:52,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508850697] [2021-05-22 02:29:52,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:29:52,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:52,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:29:52,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:29:52,663 INFO L87 Difference]: Start difference. First operand 240 states and 530 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:53,203 INFO L93 Difference]: Finished difference Result 259 states and 558 transitions. [2021-05-22 02:29:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:29:53,204 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:53,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:53,204 INFO L225 Difference]: With dead ends: 259 [2021-05-22 02:29:53,204 INFO L226 Difference]: Without dead ends: 244 [2021-05-22 02:29:53,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 959.5ms TimeCoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:29:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-22 02:29:53,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2021-05-22 02:29:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:53,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-05-22 02:29:53,206 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-05-22 02:29:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:53,206 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-05-22 02:29:53,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:53,206 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-05-22 02:29:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:53,206 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:53,206 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:53,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4073,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:53,407 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:53,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:53,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1981622179, now seen corresponding path program 534 times [2021-05-22 02:29:53,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:53,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853310976] [2021-05-22 02:29:53,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:53,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:53,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853310976] [2021-05-22 02:29:53,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853310976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:53,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948726431] [2021-05-22 02:29:53,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:53,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:29:53,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:53,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:53,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:54,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948726431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:54,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:54,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:29:54,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044406319] [2021-05-22 02:29:54,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:29:54,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:54,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:29:54,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:29:54,200 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:54,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:54,870 INFO L93 Difference]: Finished difference Result 258 states and 557 transitions. [2021-05-22 02:29:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:29:54,870 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:54,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:54,870 INFO L225 Difference]: With dead ends: 258 [2021-05-22 02:29:54,870 INFO L226 Difference]: Without dead ends: 245 [2021-05-22 02:29:54,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1117.2ms TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:29:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-22 02:29:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-05-22 02:29:54,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-05-22 02:29:54,872 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-05-22 02:29:54,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:54,872 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-05-22 02:29:54,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:54,872 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-05-22 02:29:54,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:54,873 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:54,873 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:55,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4085 [2021-05-22 02:29:55,073 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash 404280449, now seen corresponding path program 535 times [2021-05-22 02:29:55,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:55,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414235503] [2021-05-22 02:29:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:55,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:55,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:55,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414235503] [2021-05-22 02:29:55,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414235503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:55,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413317143] [2021-05-22 02:29:55,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:55,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:29:55,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:55,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413317143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:55,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:55,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:29:55,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327575702] [2021-05-22 02:29:55,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:29:55,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:55,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:29:55,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:29:55,834 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:57,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:57,208 INFO L93 Difference]: Finished difference Result 283 states and 603 transitions. [2021-05-22 02:29:57,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:29:57,208 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:57,208 INFO L225 Difference]: With dead ends: 283 [2021-05-22 02:29:57,208 INFO L226 Difference]: Without dead ends: 269 [2021-05-22 02:29:57,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1614.7ms TimeCoverageRelationStatistics Valid=156, Invalid=1566, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:29:57,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-22 02:29:57,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 241. [2021-05-22 02:29:57,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:57,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-05-22 02:29:57,211 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-05-22 02:29:57,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:57,211 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-05-22 02:29:57,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:57,211 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-05-22 02:29:57,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:57,211 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:57,211 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:57,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4097 [2021-05-22 02:29:57,421 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:57,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:57,421 INFO L82 PathProgramCache]: Analyzing trace with hash 607065435, now seen corresponding path program 536 times [2021-05-22 02:29:57,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:57,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746803588] [2021-05-22 02:29:57,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:57,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:57,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746803588] [2021-05-22 02:29:57,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746803588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:57,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650901750] [2021-05-22 02:29:57,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:57,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:29:57,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:57,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:57,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:58,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650901750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:58,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:58,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:29:58,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287930350] [2021-05-22 02:29:58,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:29:58,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:58,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:29:58,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:29:58,067 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:29:58,547 INFO L93 Difference]: Finished difference Result 260 states and 560 transitions. [2021-05-22 02:29:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:29:58,548 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:29:58,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:29:58,548 INFO L225 Difference]: With dead ends: 260 [2021-05-22 02:29:58,548 INFO L226 Difference]: Without dead ends: 245 [2021-05-22 02:29:58,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 845.5ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:29:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-22 02:29:58,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-05-22 02:29:58,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:58,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-05-22 02:29:58,550 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-05-22 02:29:58,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:29:58,550 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-05-22 02:29:58,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:29:58,550 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-05-22 02:29:58,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:29:58,550 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:29:58,551 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:29:58,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4112 [2021-05-22 02:29:58,751 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:29:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:29:58,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1045887939, now seen corresponding path program 537 times [2021-05-22 02:29:58,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:29:58,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131010148] [2021-05-22 02:29:58,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:29:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:29:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:58,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:29:58,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131010148] [2021-05-22 02:29:58,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131010148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:58,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687165682] [2021-05-22 02:29:58,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:29:58,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:29:58,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:29:58,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:29:58,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:29:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:29:59,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687165682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:29:59,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:29:59,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:29:59,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249160682] [2021-05-22 02:29:59,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:29:59,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:29:59,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:29:59,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:29:59,377 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:00,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:00,575 INFO L93 Difference]: Finished difference Result 297 states and 622 transitions. [2021-05-22 02:30:00,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:30:00,576 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:00,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:00,576 INFO L225 Difference]: With dead ends: 297 [2021-05-22 02:30:00,576 INFO L226 Difference]: Without dead ends: 290 [2021-05-22 02:30:00,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1377.2ms TimeCoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:30:00,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-05-22 02:30:00,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 243. [2021-05-22 02:30:00,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.21900826446281) internal successors, (537), 242 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 537 transitions. [2021-05-22 02:30:00,578 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 537 transitions. Word has length 20 [2021-05-22 02:30:00,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:00,578 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 537 transitions. [2021-05-22 02:30:00,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:00,578 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 537 transitions. [2021-05-22 02:30:00,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:00,579 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:00,579 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:00,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4124,538 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:00,779 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:00,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:00,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1671737627, now seen corresponding path program 538 times [2021-05-22 02:30:00,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:00,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368769156] [2021-05-22 02:30:00,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:01,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:01,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368769156] [2021-05-22 02:30:01,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368769156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:01,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882727768] [2021-05-22 02:30:01,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:01,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:30:01,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:01,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:30:01,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:01,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882727768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:01,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:01,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:30:01,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521589165] [2021-05-22 02:30:01,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:30:01,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:01,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:30:01,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:30:01,564 INFO L87 Difference]: Start difference. First operand 243 states and 537 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:02,586 INFO L93 Difference]: Finished difference Result 290 states and 611 transitions. [2021-05-22 02:30:02,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:30:02,586 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:02,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:02,587 INFO L225 Difference]: With dead ends: 290 [2021-05-22 02:30:02,587 INFO L226 Difference]: Without dead ends: 266 [2021-05-22 02:30:02,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1317.1ms TimeCoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:30:02,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-22 02:30:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 242. [2021-05-22 02:30:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-05-22 02:30:02,589 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-05-22 02:30:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:02,589 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-05-22 02:30:02,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-05-22 02:30:02,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:02,589 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:02,589 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:02,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4139,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:02,790 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:02,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:02,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1765944419, now seen corresponding path program 539 times [2021-05-22 02:30:02,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:02,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093716536] [2021-05-22 02:30:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:03,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:03,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093716536] [2021-05-22 02:30:03,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093716536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:03,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787465365] [2021-05-22 02:30:03,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:03,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:30:03,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:03,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:03,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:03,331 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-22 02:30:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:03,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787465365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:03,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:03,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:30:03,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767573675] [2021-05-22 02:30:03,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:30:03,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:03,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:30:03,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:30:03,503 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:04,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:04,003 INFO L93 Difference]: Finished difference Result 259 states and 559 transitions. [2021-05-22 02:30:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:30:04,003 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:04,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:04,003 INFO L225 Difference]: With dead ends: 259 [2021-05-22 02:30:04,003 INFO L226 Difference]: Without dead ends: 246 [2021-05-22 02:30:04,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 883.5ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:30:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-22 02:30:04,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2021-05-22 02:30:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.2148760330578514) internal successors, (536), 242 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:04,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 536 transitions. [2021-05-22 02:30:04,005 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 536 transitions. Word has length 20 [2021-05-22 02:30:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:04,006 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 536 transitions. [2021-05-22 02:30:04,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 536 transitions. [2021-05-22 02:30:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:04,006 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:04,006 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:04,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4151,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:04,207 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:04,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:04,207 INFO L82 PathProgramCache]: Analyzing trace with hash 188602689, now seen corresponding path program 540 times [2021-05-22 02:30:04,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:04,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976061582] [2021-05-22 02:30:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:04,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:04,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976061582] [2021-05-22 02:30:04,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976061582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:04,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979537440] [2021-05-22 02:30:04,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:04,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:30:04,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:04,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:30:04,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:04,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979537440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:04,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:04,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:30:04,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982032714] [2021-05-22 02:30:04,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:30:04,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:04,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:30:04,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:30:04,931 INFO L87 Difference]: Start difference. First operand 243 states and 536 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:06,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:06,221 INFO L93 Difference]: Finished difference Result 284 states and 605 transitions. [2021-05-22 02:30:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:30:06,222 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:06,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:06,222 INFO L225 Difference]: With dead ends: 284 [2021-05-22 02:30:06,222 INFO L226 Difference]: Without dead ends: 270 [2021-05-22 02:30:06,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1522.8ms TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:30:06,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-22 02:30:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 242. [2021-05-22 02:30:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:06,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-05-22 02:30:06,224 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-05-22 02:30:06,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:06,224 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-05-22 02:30:06,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:06,224 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-05-22 02:30:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:06,225 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:06,225 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:06,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4163 [2021-05-22 02:30:06,425 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:06,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:06,425 INFO L82 PathProgramCache]: Analyzing trace with hash 694948955, now seen corresponding path program 541 times [2021-05-22 02:30:06,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:06,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916795316] [2021-05-22 02:30:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:06,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:06,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916795316] [2021-05-22 02:30:06,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916795316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:06,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078679464] [2021-05-22 02:30:06,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:06,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:06,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:07,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078679464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:07,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:07,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:30:07,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587375018] [2021-05-22 02:30:07,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:30:07,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:07,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:30:07,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:30:07,173 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:08,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:08,061 INFO L93 Difference]: Finished difference Result 283 states and 601 transitions. [2021-05-22 02:30:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:30:08,061 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:08,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:08,062 INFO L225 Difference]: With dead ends: 283 [2021-05-22 02:30:08,062 INFO L226 Difference]: Without dead ends: 265 [2021-05-22 02:30:08,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1041.4ms TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:30:08,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-22 02:30:08,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 240. [2021-05-22 02:30:08,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.217573221757322) internal successors, (530), 239 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:08,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 530 transitions. [2021-05-22 02:30:08,064 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 530 transitions. Word has length 20 [2021-05-22 02:30:08,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:08,064 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 530 transitions. [2021-05-22 02:30:08,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 530 transitions. [2021-05-22 02:30:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:08,064 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:08,064 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:08,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4176 [2021-05-22 02:30:08,265 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:08,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:08,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1243532289, now seen corresponding path program 542 times [2021-05-22 02:30:08,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:08,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732729264] [2021-05-22 02:30:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:08,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:08,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732729264] [2021-05-22 02:30:08,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732729264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:08,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147115461] [2021-05-22 02:30:08,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:08,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:30:08,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:08,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:30:08,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:08,815 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-22 02:30:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:09,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147115461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:09,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:09,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:09,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897748553] [2021-05-22 02:30:09,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:09,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:09,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:09,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:09,028 INFO L87 Difference]: Start difference. First operand 240 states and 530 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:09,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:09,394 INFO L93 Difference]: Finished difference Result 259 states and 558 transitions. [2021-05-22 02:30:09,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:30:09,394 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:09,394 INFO L225 Difference]: With dead ends: 259 [2021-05-22 02:30:09,394 INFO L226 Difference]: Without dead ends: 244 [2021-05-22 02:30:09,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 821.6ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:30:09,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-22 02:30:09,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2021-05-22 02:30:09,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:09,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-05-22 02:30:09,396 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-05-22 02:30:09,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:09,396 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-05-22 02:30:09,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:09,396 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-05-22 02:30:09,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:09,397 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:09,397 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:09,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4188 [2021-05-22 02:30:09,597 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:09,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:09,597 INFO L82 PathProgramCache]: Analyzing trace with hash -409421085, now seen corresponding path program 543 times [2021-05-22 02:30:09,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:09,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64694574] [2021-05-22 02:30:09,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:09,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:09,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64694574] [2021-05-22 02:30:09,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64694574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:09,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645002235] [2021-05-22 02:30:09,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:09,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:30:09,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:09,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-22 02:30:09,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:10,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:10,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645002235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:10,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:10,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:10,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601496804] [2021-05-22 02:30:10,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:10,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:10,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:10,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:10,215 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:10,676 INFO L93 Difference]: Finished difference Result 258 states and 557 transitions. [2021-05-22 02:30:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:30:10,676 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:10,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:10,677 INFO L225 Difference]: With dead ends: 258 [2021-05-22 02:30:10,677 INFO L226 Difference]: Without dead ends: 245 [2021-05-22 02:30:10,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 750.1ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:30:10,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-22 02:30:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2021-05-22 02:30:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.215767634854772) internal successors, (534), 241 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 534 transitions. [2021-05-22 02:30:10,679 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 534 transitions. Word has length 20 [2021-05-22 02:30:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:10,679 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 534 transitions. [2021-05-22 02:30:10,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 534 transitions. [2021-05-22 02:30:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:10,679 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:10,679 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:10,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4200 [2021-05-22 02:30:10,880 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:10,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:10,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1986762815, now seen corresponding path program 544 times [2021-05-22 02:30:10,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:10,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069039161] [2021-05-22 02:30:10,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:11,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:11,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069039161] [2021-05-22 02:30:11,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069039161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:11,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992363958] [2021-05-22 02:30:11,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:11,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:30:11,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:11,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:11,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:11,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992363958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:11,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:11,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:11,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728666811] [2021-05-22 02:30:11,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:11,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:11,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:11,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:11,602 INFO L87 Difference]: Start difference. First operand 242 states and 534 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:13,140 INFO L93 Difference]: Finished difference Result 317 states and 664 transitions. [2021-05-22 02:30:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:30:13,140 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:13,141 INFO L225 Difference]: With dead ends: 317 [2021-05-22 02:30:13,141 INFO L226 Difference]: Without dead ends: 299 [2021-05-22 02:30:13,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1859.5ms TimeCoverageRelationStatistics Valid=249, Invalid=1643, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:30:13,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-22 02:30:13,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 240. [2021-05-22 02:30:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.217573221757322) internal successors, (530), 239 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 530 transitions. [2021-05-22 02:30:13,143 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 530 transitions. Word has length 20 [2021-05-22 02:30:13,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:13,143 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 530 transitions. [2021-05-22 02:30:13,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:13,143 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 530 transitions. [2021-05-22 02:30:13,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:13,143 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:13,143 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:13,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4214 [2021-05-22 02:30:13,357 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:13,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:13,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1288305703, now seen corresponding path program 545 times [2021-05-22 02:30:13,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:13,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674735691] [2021-05-22 02:30:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:13,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:13,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674735691] [2021-05-22 02:30:13,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674735691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:13,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046875760] [2021-05-22 02:30:13,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:13,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:30:13,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:13,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:13,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:13,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046875760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:13,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:13,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:13,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841374876] [2021-05-22 02:30:13,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:13,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:13,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:13,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:13,984 INFO L87 Difference]: Start difference. First operand 240 states and 530 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:14,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:14,790 INFO L93 Difference]: Finished difference Result 297 states and 623 transitions. [2021-05-22 02:30:14,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:30:14,790 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:14,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:14,790 INFO L225 Difference]: With dead ends: 297 [2021-05-22 02:30:14,790 INFO L226 Difference]: Without dead ends: 281 [2021-05-22 02:30:14,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 947.8ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:30:14,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-22 02:30:14,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 237. [2021-05-22 02:30:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.2161016949152543) internal successors, (523), 236 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 523 transitions. [2021-05-22 02:30:14,792 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 523 transitions. Word has length 20 [2021-05-22 02:30:14,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:14,792 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 523 transitions. [2021-05-22 02:30:14,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 523 transitions. [2021-05-22 02:30:14,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:14,793 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:14,793 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:14,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4226,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:14,993 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:14,993 INFO L82 PathProgramCache]: Analyzing trace with hash -625098845, now seen corresponding path program 546 times [2021-05-22 02:30:14,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:14,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312009173] [2021-05-22 02:30:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:15,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:15,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312009173] [2021-05-22 02:30:15,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312009173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:15,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330314169] [2021-05-22 02:30:15,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:15,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:30:15,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:15,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-22 02:30:15,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:15,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330314169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:15,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:15,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:15,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819793815] [2021-05-22 02:30:15,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:15,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:15,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:15,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:15,608 INFO L87 Difference]: Start difference. First operand 237 states and 523 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:16,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:16,195 INFO L93 Difference]: Finished difference Result 281 states and 589 transitions. [2021-05-22 02:30:16,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:30:16,195 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:16,195 INFO L225 Difference]: With dead ends: 281 [2021-05-22 02:30:16,195 INFO L226 Difference]: Without dead ends: 261 [2021-05-22 02:30:16,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 815.7ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:30:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-22 02:30:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2021-05-22 02:30:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.216666666666667) internal successors, (532), 240 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:16,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 532 transitions. [2021-05-22 02:30:16,197 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 532 transitions. Word has length 20 [2021-05-22 02:30:16,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:16,198 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 532 transitions. [2021-05-22 02:30:16,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 532 transitions. [2021-05-22 02:30:16,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:16,198 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:16,198 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:16,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4238,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:16,398 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:16,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:16,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2092526721, now seen corresponding path program 547 times [2021-05-22 02:30:16,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:16,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663435282] [2021-05-22 02:30:16,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:16,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:16,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663435282] [2021-05-22 02:30:16,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663435282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:16,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002806990] [2021-05-22 02:30:16,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:16,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:16,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:17,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002806990] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:17,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:17,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:17,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238325551] [2021-05-22 02:30:17,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:17,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:17,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:17,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:17,186 INFO L87 Difference]: Start difference. First operand 241 states and 532 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:18,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:18,898 INFO L93 Difference]: Finished difference Result 309 states and 648 transitions. [2021-05-22 02:30:18,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:30:18,898 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:18,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:18,898 INFO L225 Difference]: With dead ends: 309 [2021-05-22 02:30:18,898 INFO L226 Difference]: Without dead ends: 291 [2021-05-22 02:30:18,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1994.7ms TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:30:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-05-22 02:30:18,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 244. [2021-05-22 02:30:18,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.2263374485596708) internal successors, (541), 243 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:18,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 541 transitions. [2021-05-22 02:30:18,901 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 541 transitions. Word has length 20 [2021-05-22 02:30:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:18,901 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 541 transitions. [2021-05-22 02:30:18,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 541 transitions. [2021-05-22 02:30:18,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:18,901 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:18,901 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:19,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4252 [2021-05-22 02:30:19,102 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:19,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:19,102 INFO L82 PathProgramCache]: Analyzing trace with hash -361502979, now seen corresponding path program 548 times [2021-05-22 02:30:19,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:19,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179715249] [2021-05-22 02:30:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:19,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:19,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179715249] [2021-05-22 02:30:19,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179715249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:19,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530238291] [2021-05-22 02:30:19,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:19,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:30:19,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:19,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:30:19,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:19,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530238291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:19,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:19,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:19,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156049433] [2021-05-22 02:30:19,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:19,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:19,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:19,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:19,746 INFO L87 Difference]: Start difference. First operand 244 states and 541 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:20,878 INFO L93 Difference]: Finished difference Result 315 states and 660 transitions. [2021-05-22 02:30:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:30:20,878 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:20,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:20,879 INFO L225 Difference]: With dead ends: 315 [2021-05-22 02:30:20,879 INFO L226 Difference]: Without dead ends: 296 [2021-05-22 02:30:20,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1283.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:30:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-22 02:30:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 247. [2021-05-22 02:30:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.227642276422764) internal successors, (548), 246 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 548 transitions. [2021-05-22 02:30:20,881 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 548 transitions. Word has length 20 [2021-05-22 02:30:20,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:20,881 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 548 transitions. [2021-05-22 02:30:20,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 548 transitions. [2021-05-22 02:30:20,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:20,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:20,881 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:21,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4264,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:21,082 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:21,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:21,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1115738049, now seen corresponding path program 549 times [2021-05-22 02:30:21,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:21,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843977220] [2021-05-22 02:30:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:21,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:21,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843977220] [2021-05-22 02:30:21,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843977220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:21,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682909769] [2021-05-22 02:30:21,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:21,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:30:21,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:21,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-22 02:30:21,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:21,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682909769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:21,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:21,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:21,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934043675] [2021-05-22 02:30:21,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:21,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:21,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:21,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:21,708 INFO L87 Difference]: Start difference. First operand 247 states and 548 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:22,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:22,459 INFO L93 Difference]: Finished difference Result 296 states and 631 transitions. [2021-05-22 02:30:22,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:30:22,459 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:22,459 INFO L225 Difference]: With dead ends: 296 [2021-05-22 02:30:22,459 INFO L226 Difference]: Without dead ends: 278 [2021-05-22 02:30:22,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 918.9ms TimeCoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:30:22,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-22 02:30:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 251. [2021-05-22 02:30:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.224) internal successors, (556), 250 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 556 transitions. [2021-05-22 02:30:22,462 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 556 transitions. Word has length 20 [2021-05-22 02:30:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:22,462 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 556 transitions. [2021-05-22 02:30:22,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 556 transitions. [2021-05-22 02:30:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:22,462 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:22,462 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:22,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4277 [2021-05-22 02:30:22,662 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:22,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:22,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1912473801, now seen corresponding path program 550 times [2021-05-22 02:30:22,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:22,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199414095] [2021-05-22 02:30:22,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:22,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:22,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199414095] [2021-05-22 02:30:22,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199414095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:22,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834304019] [2021-05-22 02:30:22,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:22,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:30:22,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:22,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:22,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:23,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834304019] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:23,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:23,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:23,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94337378] [2021-05-22 02:30:23,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:23,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:23,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:23,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:23,184 INFO L87 Difference]: Start difference. First operand 251 states and 556 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:24,799 INFO L93 Difference]: Finished difference Result 357 states and 733 transitions. [2021-05-22 02:30:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-22 02:30:24,799 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:24,800 INFO L225 Difference]: With dead ends: 357 [2021-05-22 02:30:24,800 INFO L226 Difference]: Without dead ends: 314 [2021-05-22 02:30:24,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1630.6ms TimeCoverageRelationStatistics Valid=291, Invalid=1965, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:30:24,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-22 02:30:24,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 254. [2021-05-22 02:30:24,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.225296442687747) internal successors, (563), 253 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:24,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 563 transitions. [2021-05-22 02:30:24,802 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 563 transitions. Word has length 20 [2021-05-22 02:30:24,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:24,802 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 563 transitions. [2021-05-22 02:30:24,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:24,802 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 563 transitions. [2021-05-22 02:30:24,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:24,803 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:24,803 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:25,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4291,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:25,004 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:25,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:25,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1876147229, now seen corresponding path program 551 times [2021-05-22 02:30:25,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:25,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889411072] [2021-05-22 02:30:25,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:25,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:25,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889411072] [2021-05-22 02:30:25,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889411072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:25,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362690356] [2021-05-22 02:30:25,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:25,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:30:25,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:25,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:25,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:25,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362690356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:25,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:25,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:25,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552467067] [2021-05-22 02:30:25,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:25,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:25,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:25,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:25,658 INFO L87 Difference]: Start difference. First operand 254 states and 563 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:26,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:26,648 INFO L93 Difference]: Finished difference Result 332 states and 704 transitions. [2021-05-22 02:30:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:30:26,649 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:26,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:26,649 INFO L225 Difference]: With dead ends: 332 [2021-05-22 02:30:26,649 INFO L226 Difference]: Without dead ends: 313 [2021-05-22 02:30:26,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1078.6ms TimeCoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:30:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-05-22 02:30:26,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 256. [2021-05-22 02:30:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:26,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-05-22 02:30:26,652 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-05-22 02:30:26,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:26,652 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-05-22 02:30:26,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:26,652 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-05-22 02:30:26,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:26,652 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:26,652 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:26,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:26,852 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:26,853 INFO L82 PathProgramCache]: Analyzing trace with hash -500831717, now seen corresponding path program 552 times [2021-05-22 02:30:26,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:26,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004183478] [2021-05-22 02:30:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:27,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:27,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004183478] [2021-05-22 02:30:27,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004183478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:27,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691868742] [2021-05-22 02:30:27,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:27,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:30:27,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:27,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:30:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:27,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691868742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:27,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:27,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:27,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674649008] [2021-05-22 02:30:27,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:27,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:27,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:27,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:27,562 INFO L87 Difference]: Start difference. First operand 256 states and 569 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:27,939 INFO L93 Difference]: Finished difference Result 275 states and 597 transitions. [2021-05-22 02:30:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:30:27,940 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:27,941 INFO L225 Difference]: With dead ends: 275 [2021-05-22 02:30:27,941 INFO L226 Difference]: Without dead ends: 260 [2021-05-22 02:30:27,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 782.0ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:30:27,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-22 02:30:27,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2021-05-22 02:30:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.23046875) internal successors, (571), 256 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 571 transitions. [2021-05-22 02:30:27,943 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 571 transitions. Word has length 20 [2021-05-22 02:30:27,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:27,943 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 571 transitions. [2021-05-22 02:30:27,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:27,943 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 571 transitions. [2021-05-22 02:30:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:27,943 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:27,943 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:28,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4317,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:28,159 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:28,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:28,159 INFO L82 PathProgramCache]: Analyzing trace with hash 2141182205, now seen corresponding path program 553 times [2021-05-22 02:30:28,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:28,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432228820] [2021-05-22 02:30:28,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:28,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:28,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432228820] [2021-05-22 02:30:28,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432228820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:28,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891511547] [2021-05-22 02:30:28,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:28,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:28,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:28,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891511547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:28,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:28,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:28,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335008835] [2021-05-22 02:30:28,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:28,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:28,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:28,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:28,977 INFO L87 Difference]: Start difference. First operand 257 states and 571 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:29,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:29,412 INFO L93 Difference]: Finished difference Result 274 states and 596 transitions. [2021-05-22 02:30:29,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:30:29,413 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:29,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:29,413 INFO L225 Difference]: With dead ends: 274 [2021-05-22 02:30:29,413 INFO L226 Difference]: Without dead ends: 261 [2021-05-22 02:30:29,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 893.7ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:30:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-22 02:30:29,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 258. [2021-05-22 02:30:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.2295719844357977) internal successors, (573), 257 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 573 transitions. [2021-05-22 02:30:29,415 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 573 transitions. Word has length 20 [2021-05-22 02:30:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:29,415 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 573 transitions. [2021-05-22 02:30:29,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:29,415 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 573 transitions. [2021-05-22 02:30:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:29,415 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:29,415 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:29,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4329 [2021-05-22 02:30:29,616 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:29,616 INFO L82 PathProgramCache]: Analyzing trace with hash 563840475, now seen corresponding path program 554 times [2021-05-22 02:30:29,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:29,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844335866] [2021-05-22 02:30:29,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:29,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:29,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844335866] [2021-05-22 02:30:29,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844335866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:29,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390794791] [2021-05-22 02:30:29,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:29,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:30:29,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:29,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:30:29,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:30,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390794791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:30,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:30,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:30,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463021099] [2021-05-22 02:30:30,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:30,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:30,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:30,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:30,410 INFO L87 Difference]: Start difference. First operand 258 states and 573 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:31,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:31,101 INFO L93 Difference]: Finished difference Result 299 states and 640 transitions. [2021-05-22 02:30:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:30:31,102 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:31,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:31,102 INFO L225 Difference]: With dead ends: 299 [2021-05-22 02:30:31,102 INFO L226 Difference]: Without dead ends: 281 [2021-05-22 02:30:31,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1122.4ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:30:31,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-22 02:30:31,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 256. [2021-05-22 02:30:31,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-05-22 02:30:31,104 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-05-22 02:30:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:31,104 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-05-22 02:30:31,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-05-22 02:30:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:31,105 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:31,105 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:31,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4341,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:31,305 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:31,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:31,305 INFO L82 PathProgramCache]: Analyzing trace with hash 658047267, now seen corresponding path program 555 times [2021-05-22 02:30:31,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:31,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653323392] [2021-05-22 02:30:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:31,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:31,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653323392] [2021-05-22 02:30:31,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653323392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:31,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029652936] [2021-05-22 02:30:31,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:31,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:30:31,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:31,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:31,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:31,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029652936] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:31,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:31,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:31,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120640668] [2021-05-22 02:30:31,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:31,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:31,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:31,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:31,973 INFO L87 Difference]: Start difference. First operand 256 states and 569 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:32,543 INFO L93 Difference]: Finished difference Result 284 states and 611 transitions. [2021-05-22 02:30:32,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:30:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:32,544 INFO L225 Difference]: With dead ends: 284 [2021-05-22 02:30:32,544 INFO L226 Difference]: Without dead ends: 277 [2021-05-22 02:30:32,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 847.3ms TimeCoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:30:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-05-22 02:30:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 257. [2021-05-22 02:30:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.234375) internal successors, (572), 256 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:32,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 572 transitions. [2021-05-22 02:30:32,546 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 572 transitions. Word has length 20 [2021-05-22 02:30:32,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:32,546 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 572 transitions. [2021-05-22 02:30:32,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:32,546 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 572 transitions. [2021-05-22 02:30:32,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:32,547 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:32,547 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:32,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4353 [2021-05-22 02:30:32,747 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:32,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:32,747 INFO L82 PathProgramCache]: Analyzing trace with hash -919294463, now seen corresponding path program 556 times [2021-05-22 02:30:32,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:32,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403356517] [2021-05-22 02:30:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:32,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:32,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403356517] [2021-05-22 02:30:32,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403356517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:32,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960573107] [2021-05-22 02:30:32,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:33,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:30:33,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:33,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:33,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:33,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960573107] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:33,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:33,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:33,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183430190] [2021-05-22 02:30:33,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:33,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:33,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:33,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:33,471 INFO L87 Difference]: Start difference. First operand 257 states and 572 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:34,491 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-05-22 02:30:34,652 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-05-22 02:30:34,823 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-05-22 02:30:35,212 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-05-22 02:30:35,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:35,245 INFO L93 Difference]: Finished difference Result 322 states and 680 transitions. [2021-05-22 02:30:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:30:35,245 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:35,245 INFO L225 Difference]: With dead ends: 322 [2021-05-22 02:30:35,245 INFO L226 Difference]: Without dead ends: 298 [2021-05-22 02:30:35,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1999.0ms TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:30:35,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-22 02:30:35,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 256. [2021-05-22 02:30:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:35,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-05-22 02:30:35,248 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-05-22 02:30:35,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:35,248 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-05-22 02:30:35,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:35,248 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-05-22 02:30:35,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:35,248 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:35,248 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:35,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4368,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:35,449 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:35,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:35,449 INFO L82 PathProgramCache]: Analyzing trace with hash -412948197, now seen corresponding path program 557 times [2021-05-22 02:30:35,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:35,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816200993] [2021-05-22 02:30:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:35,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:35,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816200993] [2021-05-22 02:30:35,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816200993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:35,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96856727] [2021-05-22 02:30:35,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:35,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:30:35,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:35,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:30:35,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:36,107 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-22 02:30:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:36,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96856727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:36,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:36,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:36,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647454807] [2021-05-22 02:30:36,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:36,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:36,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:36,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:36,236 INFO L87 Difference]: Start difference. First operand 256 states and 569 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:37,133 INFO L93 Difference]: Finished difference Result 318 states and 667 transitions. [2021-05-22 02:30:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:30:37,133 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:37,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:37,134 INFO L225 Difference]: With dead ends: 318 [2021-05-22 02:30:37,134 INFO L226 Difference]: Without dead ends: 300 [2021-05-22 02:30:37,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1243.3ms TimeCoverageRelationStatistics Valid=168, Invalid=1164, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:30:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-22 02:30:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 256. [2021-05-22 02:30:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.231372549019608) internal successors, (569), 255 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 569 transitions. [2021-05-22 02:30:37,136 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 569 transitions. Word has length 20 [2021-05-22 02:30:37,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:37,136 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 569 transitions. [2021-05-22 02:30:37,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:37,136 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 569 transitions. [2021-05-22 02:30:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:37,137 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:37,137 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:37,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4380,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:37,337 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:37,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:37,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1753934048, now seen corresponding path program 558 times [2021-05-22 02:30:37,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:37,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754947750] [2021-05-22 02:30:37,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:30:37,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:37,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754947750] [2021-05-22 02:30:37,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754947750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:37,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215416187] [2021-05-22 02:30:37,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:37,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:30:37,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:37,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:30:37,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:37,821 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-22 02:30:37,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-05-22 02:30:37,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,832 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-22 02:30:37,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-05-22 02:30:37,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,841 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:37,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2021-05-22 02:30:37,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,848 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:37,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:37,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,858 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-05-22 02:30:37,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2021-05-22 02:30:37,860 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,866 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:37,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-05-22 02:30:37,867 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:37,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:37,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-22 02:30:37,874 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,882 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:37,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-05-22 02:30:37,883 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:37,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:37,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:37,889 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,896 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:37,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:37,897 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,904 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:37,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:37,904 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:37,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:37,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-22 02:30:37,909 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,916 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:37,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:37,917 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:37,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:37,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:37,933 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,940 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:37,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-05-22 02:30:37,941 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,954 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:37,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-05-22 02:30:37,957 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:37,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:37,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-22 02:30:37,963 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:37,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:37,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-22 02:30:37,970 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,978 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:37,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:37,979 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,988 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:37,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-05-22 02:30:37,989 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:37,997 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:37,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:37,997 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,005 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-05-22 02:30:38,006 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,013 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:38,014 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,020 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:38,021 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-22 02:30:38,026 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,034 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-05-22 02:30:38,035 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,041 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-05-22 02:30:38,043 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-22 02:30:38,051 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-05-22 02:30:38,057 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,077 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-05-22 02:30:38,078 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-22 02:30:38,082 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,089 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-05-22 02:30:38,090 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-22 02:30:38,094 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,100 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-05-22 02:30:38,101 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-05-22 02:30:38,106 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,112 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-05-22 02:30:38,113 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,125 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-05-22 02:30:38,126 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,134 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-05-22 02:30:38,135 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-22 02:30:38,138 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:38,143 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-22 02:30:38,147 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,150 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-22 02:30:38,150 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,157 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:38,158 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,163 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:38,164 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,170 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-05-22 02:30:38,171 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,177 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-05-22 02:30:38,177 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-22 02:30:38,180 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,187 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-05-22 02:30:38,188 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:38,193 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:38,197 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,202 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-05-22 02:30:38,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-05-22 02:30:38,203 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-22 02:30:38,206 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-22 02:30:38,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-05-22 02:30:38,210 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-05-22 02:30:38,212 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-05-22 02:30:38,288 INFO L628 ElimStorePlain]: treesize reduction 117, result has 34.6 percent of original size [2021-05-22 02:30:38,288 INFO L518 ElimStorePlain]: Eliminatee scoreA vanished before elimination [2021-05-22 02:30:38,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-05-22 02:30:38,289 INFO L247 ElimStorePlain]: Needed 55 recursive calls to eliminate 3 variables, input treesize:2437, output treesize:44 [2021-05-22 02:30:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:38,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215416187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:38,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:38,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-05-22 02:30:38,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432723245] [2021-05-22 02:30:38,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-22 02:30:38,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:38,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-22 02:30:38,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-22 02:30:38,394 INFO L87 Difference]: Start difference. First operand 256 states and 569 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:39,443 INFO L93 Difference]: Finished difference Result 367 states and 764 transitions. [2021-05-22 02:30:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:30:39,444 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:39,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:39,444 INFO L225 Difference]: With dead ends: 367 [2021-05-22 02:30:39,444 INFO L226 Difference]: Without dead ends: 365 [2021-05-22 02:30:39,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1104.2ms TimeCoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:30:39,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-05-22 02:30:39,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 281. [2021-05-22 02:30:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-05-22 02:30:39,447 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-05-22 02:30:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:39,447 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-05-22 02:30:39,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-05-22 02:30:39,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:39,447 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:39,447 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:39,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4392 [2021-05-22 02:30:39,657 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:39,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1878238050, now seen corresponding path program 559 times [2021-05-22 02:30:39,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:39,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347885270] [2021-05-22 02:30:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:30:39,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:39,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347885270] [2021-05-22 02:30:39,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347885270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:39,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419958283] [2021-05-22 02:30:39,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:39,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:30:39,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:30:39,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419958283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:39,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:39,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:30:39,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377047780] [2021-05-22 02:30:39,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:30:39,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:39,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:30:39,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:30:39,956 INFO L87 Difference]: Start difference. First operand 281 states and 627 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:40,292 INFO L93 Difference]: Finished difference Result 319 states and 697 transitions. [2021-05-22 02:30:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:30:40,293 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:40,293 INFO L225 Difference]: With dead ends: 319 [2021-05-22 02:30:40,293 INFO L226 Difference]: Without dead ends: 316 [2021-05-22 02:30:40,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 386.1ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-05-22 02:30:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-22 02:30:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 281. [2021-05-22 02:30:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2357142857142858) internal successors, (626), 280 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:40,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 626 transitions. [2021-05-22 02:30:40,295 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 626 transitions. Word has length 20 [2021-05-22 02:30:40,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:40,295 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 626 transitions. [2021-05-22 02:30:40,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:40,295 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 626 transitions. [2021-05-22 02:30:40,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:40,296 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:40,296 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:40,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4450 [2021-05-22 02:30:40,496 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:40,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:40,496 INFO L82 PathProgramCache]: Analyzing trace with hash 383787555, now seen corresponding path program 560 times [2021-05-22 02:30:40,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:40,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939573900] [2021-05-22 02:30:40,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:40,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:40,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939573900] [2021-05-22 02:30:40,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939573900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:40,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026768194] [2021-05-22 02:30:40,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:40,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:30:40,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:40,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:30:40,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:41,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026768194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:41,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:41,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:41,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025356119] [2021-05-22 02:30:41,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:41,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:41,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:41,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:41,048 INFO L87 Difference]: Start difference. First operand 281 states and 626 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:41,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:41,593 INFO L93 Difference]: Finished difference Result 333 states and 719 transitions. [2021-05-22 02:30:41,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:30:41,593 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:41,593 INFO L225 Difference]: With dead ends: 333 [2021-05-22 02:30:41,593 INFO L226 Difference]: Without dead ends: 312 [2021-05-22 02:30:41,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 731.8ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:30:41,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-05-22 02:30:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2021-05-22 02:30:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2367491166077738) internal successors, (633), 283 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 633 transitions. [2021-05-22 02:30:41,596 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 633 transitions. Word has length 20 [2021-05-22 02:30:41,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:41,596 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 633 transitions. [2021-05-22 02:30:41,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 633 transitions. [2021-05-22 02:30:41,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:41,596 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:41,596 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:41,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4458,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:41,797 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:41,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:41,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1682754045, now seen corresponding path program 561 times [2021-05-22 02:30:41,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:41,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778114878] [2021-05-22 02:30:41,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:41,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:41,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778114878] [2021-05-22 02:30:41,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778114878] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:41,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142160010] [2021-05-22 02:30:41,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:41,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:30:41,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:41,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:30:41,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:42,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142160010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:42,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:42,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:42,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411685692] [2021-05-22 02:30:42,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:42,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:42,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:42,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:42,421 INFO L87 Difference]: Start difference. First operand 284 states and 633 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:43,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:43,173 INFO L93 Difference]: Finished difference Result 338 states and 718 transitions. [2021-05-22 02:30:43,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:30:43,174 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:43,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:43,174 INFO L225 Difference]: With dead ends: 338 [2021-05-22 02:30:43,174 INFO L226 Difference]: Without dead ends: 312 [2021-05-22 02:30:43,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 991.2ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:30:43,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-05-22 02:30:43,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 285. [2021-05-22 02:30:43,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.23943661971831) internal successors, (636), 284 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 636 transitions. [2021-05-22 02:30:43,176 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 636 transitions. Word has length 20 [2021-05-22 02:30:43,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:43,176 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 636 transitions. [2021-05-22 02:30:43,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:43,176 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 636 transitions. [2021-05-22 02:30:43,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:43,177 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:43,177 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:43,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4470 [2021-05-22 02:30:43,377 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:43,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:43,377 INFO L82 PathProgramCache]: Analyzing trace with hash 854508981, now seen corresponding path program 562 times [2021-05-22 02:30:43,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:43,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188193579] [2021-05-22 02:30:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:43,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:43,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188193579] [2021-05-22 02:30:43,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188193579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:43,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284151060] [2021-05-22 02:30:43,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:43,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:30:43,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:43,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:43,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:43,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284151060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:43,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:43,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:43,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294802691] [2021-05-22 02:30:43,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:43,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:43,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:43,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:43,988 INFO L87 Difference]: Start difference. First operand 285 states and 636 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:44,687 INFO L93 Difference]: Finished difference Result 330 states and 713 transitions. [2021-05-22 02:30:44,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:30:44,688 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:44,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:44,688 INFO L225 Difference]: With dead ends: 330 [2021-05-22 02:30:44,688 INFO L226 Difference]: Without dead ends: 312 [2021-05-22 02:30:44,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 972.1ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:30:44,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-05-22 02:30:44,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2021-05-22 02:30:44,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2367491166077738) internal successors, (633), 283 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:44,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 633 transitions. [2021-05-22 02:30:44,690 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 633 transitions. Word has length 20 [2021-05-22 02:30:44,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:44,690 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 633 transitions. [2021-05-22 02:30:44,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:44,691 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 633 transitions. [2021-05-22 02:30:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:44,691 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:44,691 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:44,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4483 [2021-05-22 02:30:44,891 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:44,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:44,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1651244733, now seen corresponding path program 563 times [2021-05-22 02:30:44,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:44,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745777551] [2021-05-22 02:30:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:45,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:45,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:45,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745777551] [2021-05-22 02:30:45,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745777551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:45,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671818310] [2021-05-22 02:30:45,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:45,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:30:45,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:45,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:45,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:45,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671818310] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:45,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:45,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:45,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607402661] [2021-05-22 02:30:45,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:45,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:45,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:45,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:45,395 INFO L87 Difference]: Start difference. First operand 284 states and 633 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:46,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:46,028 INFO L93 Difference]: Finished difference Result 347 states and 744 transitions. [2021-05-22 02:30:46,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:30:46,028 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:46,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:46,029 INFO L225 Difference]: With dead ends: 347 [2021-05-22 02:30:46,029 INFO L226 Difference]: Without dead ends: 328 [2021-05-22 02:30:46,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 728.8ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:30:46,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-22 02:30:46,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 285. [2021-05-22 02:30:46,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.23943661971831) internal successors, (636), 284 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 636 transitions. [2021-05-22 02:30:46,031 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 636 transitions. Word has length 20 [2021-05-22 02:30:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:46,031 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 636 transitions. [2021-05-22 02:30:46,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 636 transitions. [2021-05-22 02:30:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:46,032 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:46,032 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:46,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4495 [2021-05-22 02:30:46,232 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:46,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:46,232 INFO L82 PathProgramCache]: Analyzing trace with hash 705965373, now seen corresponding path program 564 times [2021-05-22 02:30:46,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:46,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698235009] [2021-05-22 02:30:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:46,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:46,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698235009] [2021-05-22 02:30:46,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698235009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:46,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805539533] [2021-05-22 02:30:46,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:46,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:30:46,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:46,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:30:46,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:46,779 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-22 02:30:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:46,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805539533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:46,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:46,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:46,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134334052] [2021-05-22 02:30:46,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:46,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:46,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:46,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:46,897 INFO L87 Difference]: Start difference. First operand 285 states and 636 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:48,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:48,361 INFO L93 Difference]: Finished difference Result 373 states and 780 transitions. [2021-05-22 02:30:48,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-22 02:30:48,361 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:48,362 INFO L225 Difference]: With dead ends: 373 [2021-05-22 02:30:48,362 INFO L226 Difference]: Without dead ends: 350 [2021-05-22 02:30:48,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1672.0ms TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:30:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-22 02:30:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 284. [2021-05-22 02:30:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.2367491166077738) internal successors, (633), 283 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 633 transitions. [2021-05-22 02:30:48,364 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 633 transitions. Word has length 20 [2021-05-22 02:30:48,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:48,364 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 633 transitions. [2021-05-22 02:30:48,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:48,364 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 633 transitions. [2021-05-22 02:30:48,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:48,365 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:48,365 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:48,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4507,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:48,573 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:48,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:48,573 INFO L82 PathProgramCache]: Analyzing trace with hash -671736063, now seen corresponding path program 565 times [2021-05-22 02:30:48,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:48,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749005288] [2021-05-22 02:30:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:48,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:48,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:48,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749005288] [2021-05-22 02:30:48,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749005288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:48,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760198744] [2021-05-22 02:30:48,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:48,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:48,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:49,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760198744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:49,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:49,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:49,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119892776] [2021-05-22 02:30:49,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:49,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:49,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:49,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:49,148 INFO L87 Difference]: Start difference. First operand 284 states and 633 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:50,100 INFO L93 Difference]: Finished difference Result 342 states and 726 transitions. [2021-05-22 02:30:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:30:50,100 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:50,100 INFO L225 Difference]: With dead ends: 342 [2021-05-22 02:30:50,101 INFO L226 Difference]: Without dead ends: 320 [2021-05-22 02:30:50,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1140.5ms TimeCoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:30:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-22 02:30:50,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 285. [2021-05-22 02:30:50,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.2359154929577465) internal successors, (635), 284 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:50,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 635 transitions. [2021-05-22 02:30:50,103 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 635 transitions. Word has length 20 [2021-05-22 02:30:50,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:50,103 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 635 transitions. [2021-05-22 02:30:50,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 635 transitions. [2021-05-22 02:30:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:50,103 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:50,103 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:50,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4520,566 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:50,304 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:50,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:50,304 INFO L82 PathProgramCache]: Analyzing trace with hash -165389797, now seen corresponding path program 566 times [2021-05-22 02:30:50,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:50,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321163730] [2021-05-22 02:30:50,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:50,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:50,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321163730] [2021-05-22 02:30:50,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321163730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:50,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215938012] [2021-05-22 02:30:50,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:50,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:30:50,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:50,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:50,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:50,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215938012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:50,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:50,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:50,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511778006] [2021-05-22 02:30:50,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:50,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:50,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:50,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:50,894 INFO L87 Difference]: Start difference. First operand 285 states and 635 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:51,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:51,933 INFO L93 Difference]: Finished difference Result 351 states and 744 transitions. [2021-05-22 02:30:51,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:30:51,933 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:51,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:51,933 INFO L225 Difference]: With dead ends: 351 [2021-05-22 02:30:51,934 INFO L226 Difference]: Without dead ends: 329 [2021-05-22 02:30:51,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1193.6ms TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:30:51,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-05-22 02:30:51,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 285. [2021-05-22 02:30:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.232394366197183) internal successors, (634), 284 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 634 transitions. [2021-05-22 02:30:51,936 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 634 transitions. Word has length 20 [2021-05-22 02:30:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:51,936 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 634 transitions. [2021-05-22 02:30:51,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 634 transitions. [2021-05-22 02:30:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:51,936 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:51,936 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:52,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4532,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:52,149 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:52,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1732995997, now seen corresponding path program 567 times [2021-05-22 02:30:52,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:52,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124232492] [2021-05-22 02:30:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:52,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:52,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124232492] [2021-05-22 02:30:52,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124232492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:52,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451534181] [2021-05-22 02:30:52,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:52,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:30:52,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:52,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:52,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:52,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451534181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:52,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:52,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:52,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107234045] [2021-05-22 02:30:52,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:52,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:52,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:52,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:52,772 INFO L87 Difference]: Start difference. First operand 285 states and 634 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:53,326 INFO L93 Difference]: Finished difference Result 308 states and 677 transitions. [2021-05-22 02:30:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:30:53,327 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:53,327 INFO L225 Difference]: With dead ends: 308 [2021-05-22 02:30:53,327 INFO L226 Difference]: Without dead ends: 295 [2021-05-22 02:30:53,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 815.9ms TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:30:53,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-05-22 02:30:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 286. [2021-05-22 02:30:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.231578947368421) internal successors, (636), 285 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:53,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 636 transitions. [2021-05-22 02:30:53,329 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 636 transitions. Word has length 20 [2021-05-22 02:30:53,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:53,329 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 636 transitions. [2021-05-22 02:30:53,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 636 transitions. [2021-05-22 02:30:53,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:53,330 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:53,330 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:53,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4544,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:53,530 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:53,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:53,530 INFO L82 PathProgramCache]: Analyzing trace with hash 984629569, now seen corresponding path program 568 times [2021-05-22 02:30:53,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:53,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071113550] [2021-05-22 02:30:53,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:53,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:53,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:53,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071113550] [2021-05-22 02:30:53,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071113550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:53,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371420622] [2021-05-22 02:30:53,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:53,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:30:53,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:53,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:53,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:54,098 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-22 02:30:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:54,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371420622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:54,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:54,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:54,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408135205] [2021-05-22 02:30:54,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:54,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:54,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:54,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:54,275 INFO L87 Difference]: Start difference. First operand 286 states and 636 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:55,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:55,063 INFO L93 Difference]: Finished difference Result 327 states and 703 transitions. [2021-05-22 02:30:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:30:55,063 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:55,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:55,063 INFO L225 Difference]: With dead ends: 327 [2021-05-22 02:30:55,063 INFO L226 Difference]: Without dead ends: 309 [2021-05-22 02:30:55,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1063.7ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:30:55,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-22 02:30:55,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 285. [2021-05-22 02:30:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.232394366197183) internal successors, (634), 284 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 634 transitions. [2021-05-22 02:30:55,066 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 634 transitions. Word has length 20 [2021-05-22 02:30:55,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:55,066 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 634 transitions. [2021-05-22 02:30:55,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:55,066 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 634 transitions. [2021-05-22 02:30:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:55,066 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:55,066 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:55,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4556 [2021-05-22 02:30:55,267 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:55,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1490975835, now seen corresponding path program 569 times [2021-05-22 02:30:55,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:55,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314509809] [2021-05-22 02:30:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:55,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:55,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314509809] [2021-05-22 02:30:55,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314509809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:55,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432336043] [2021-05-22 02:30:55,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:55,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:30:55,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:55,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:30:55,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:55,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432336043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:55,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:55,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:55,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497486429] [2021-05-22 02:30:55,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:55,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:55,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:55,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:55,927 INFO L87 Difference]: Start difference. First operand 285 states and 634 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:56,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:56,925 INFO L93 Difference]: Finished difference Result 337 states and 716 transitions. [2021-05-22 02:30:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:30:56,925 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:56,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:56,925 INFO L225 Difference]: With dead ends: 337 [2021-05-22 02:30:56,925 INFO L226 Difference]: Without dead ends: 323 [2021-05-22 02:30:56,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1234.2ms TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:30:56,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-05-22 02:30:56,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 285. [2021-05-22 02:30:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.232394366197183) internal successors, (634), 284 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:56,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 634 transitions. [2021-05-22 02:30:56,928 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 634 transitions. Word has length 20 [2021-05-22 02:30:56,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:56,928 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 634 transitions. [2021-05-22 02:30:56,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:56,928 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 634 transitions. [2021-05-22 02:30:56,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:56,928 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:56,928 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:57,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4568,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:57,128 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:57,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:57,129 INFO L82 PathProgramCache]: Analyzing trace with hash -637109216, now seen corresponding path program 570 times [2021-05-22 02:30:57,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:57,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183146031] [2021-05-22 02:30:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:30:57,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:57,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183146031] [2021-05-22 02:30:57,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183146031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:57,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001969003] [2021-05-22 02:30:57,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:57,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:30:57,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:57,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-22 02:30:57,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:30:57,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001969003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:57,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:57,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-22 02:30:57,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086312637] [2021-05-22 02:30:57,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-22 02:30:57,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:57,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-22 02:30:57,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-22 02:30:57,482 INFO L87 Difference]: Start difference. First operand 285 states and 634 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:57,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:57,689 INFO L93 Difference]: Finished difference Result 304 states and 670 transitions. [2021-05-22 02:30:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:30:57,689 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:57,689 INFO L225 Difference]: With dead ends: 304 [2021-05-22 02:30:57,689 INFO L226 Difference]: Without dead ends: 302 [2021-05-22 02:30:57,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:30:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-22 02:30:57,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 281. [2021-05-22 02:30:57,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:57,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-05-22 02:30:57,692 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-05-22 02:30:57,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:57,692 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-05-22 02:30:57,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-05-22 02:30:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:57,692 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:57,692 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:57,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4585 [2021-05-22 02:30:57,893 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2007255709, now seen corresponding path program 571 times [2021-05-22 02:30:57,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:57,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279626696] [2021-05-22 02:30:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:58,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:58,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279626696] [2021-05-22 02:30:58,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279626696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:58,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695292141] [2021-05-22 02:30:58,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:58,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:30:58,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:58,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695292141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:58,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:58,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:58,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045913788] [2021-05-22 02:30:58,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:58,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:58,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:58,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:58,401 INFO L87 Difference]: Start difference. First operand 281 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:30:59,119 INFO L93 Difference]: Finished difference Result 345 states and 740 transitions. [2021-05-22 02:30:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:30:59,120 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:30:59,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:30:59,120 INFO L225 Difference]: With dead ends: 345 [2021-05-22 02:30:59,120 INFO L226 Difference]: Without dead ends: 326 [2021-05-22 02:30:59,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 884.6ms TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:30:59,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-22 02:30:59,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2021-05-22 02:30:59,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-05-22 02:30:59,122 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-05-22 02:30:59,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:30:59,123 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-05-22 02:30:59,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:30:59,123 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-05-22 02:30:59,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:30:59,123 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:30:59,123 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:30:59,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4595 [2021-05-22 02:30:59,323 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:30:59,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:30:59,324 INFO L82 PathProgramCache]: Analyzing trace with hash 7840897, now seen corresponding path program 572 times [2021-05-22 02:30:59,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:30:59,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757898470] [2021-05-22 02:30:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:30:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:30:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:59,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:30:59,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757898470] [2021-05-22 02:30:59,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757898470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:59,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909542787] [2021-05-22 02:30:59,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:30:59,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:30:59,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:30:59,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:30:59,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:30:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:30:59,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909542787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:30:59,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:30:59,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:30:59,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264289351] [2021-05-22 02:30:59,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:30:59,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:30:59,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:30:59,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:30:59,926 INFO L87 Difference]: Start difference. First operand 281 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:00,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:00,546 INFO L93 Difference]: Finished difference Result 336 states and 729 transitions. [2021-05-22 02:31:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:31:00,546 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:00,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:00,547 INFO L225 Difference]: With dead ends: 336 [2021-05-22 02:31:00,547 INFO L226 Difference]: Without dead ends: 318 [2021-05-22 02:31:00,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 856.3ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:31:00,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-22 02:31:00,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 282. [2021-05-22 02:31:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.2419928825622777) internal successors, (630), 281 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 630 transitions. [2021-05-22 02:31:00,549 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 630 transitions. Word has length 20 [2021-05-22 02:31:00,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:00,549 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 630 transitions. [2021-05-22 02:31:00,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 630 transitions. [2021-05-22 02:31:00,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:00,550 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:00,550 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:00,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4607,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:00,750 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:00,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:00,750 INFO L82 PathProgramCache]: Analyzing trace with hash 691347580, now seen corresponding path program 573 times [2021-05-22 02:31:00,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:00,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933759679] [2021-05-22 02:31:00,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:31:00,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:00,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933759679] [2021-05-22 02:31:00,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933759679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:00,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996804363] [2021-05-22 02:31:00,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:00,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:31:00,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:00,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-22 02:31:00,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:31:01,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996804363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:01,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:01,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:31:01,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177836272] [2021-05-22 02:31:01,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:31:01,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:01,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:31:01,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:31:01,117 INFO L87 Difference]: Start difference. First operand 282 states and 630 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:01,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:01,345 INFO L93 Difference]: Finished difference Result 298 states and 660 transitions. [2021-05-22 02:31:01,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:31:01,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:01,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:01,345 INFO L225 Difference]: With dead ends: 298 [2021-05-22 02:31:01,345 INFO L226 Difference]: Without dead ends: 298 [2021-05-22 02:31:01,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 394.0ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-05-22 02:31:01,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-22 02:31:01,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 281. [2021-05-22 02:31:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.2392857142857143) internal successors, (627), 280 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:01,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 627 transitions. [2021-05-22 02:31:01,348 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 627 transitions. Word has length 20 [2021-05-22 02:31:01,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:01,348 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 627 transitions. [2021-05-22 02:31:01,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:01,348 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 627 transitions. [2021-05-22 02:31:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:01,348 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:01,348 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:01,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4619 [2021-05-22 02:31:01,549 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:01,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:01,549 INFO L82 PathProgramCache]: Analyzing trace with hash 804576649, now seen corresponding path program 574 times [2021-05-22 02:31:01,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:01,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515161614] [2021-05-22 02:31:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:01,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:01,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515161614] [2021-05-22 02:31:01,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515161614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:01,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608247399] [2021-05-22 02:31:01,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:01,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:31:01,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:01,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:01,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:02,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608247399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:02,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:02,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:02,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950581364] [2021-05-22 02:31:02,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:02,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:02,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:02,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:02,075 INFO L87 Difference]: Start difference. First operand 281 states and 627 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:03,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:03,250 INFO L93 Difference]: Finished difference Result 365 states and 762 transitions. [2021-05-22 02:31:03,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:31:03,250 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:03,250 INFO L225 Difference]: With dead ends: 365 [2021-05-22 02:31:03,250 INFO L226 Difference]: Without dead ends: 322 [2021-05-22 02:31:03,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1289.2ms TimeCoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:31:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-22 02:31:03,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 282. [2021-05-22 02:31:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.2384341637010676) internal successors, (629), 281 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:03,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 629 transitions. [2021-05-22 02:31:03,253 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 629 transitions. Word has length 20 [2021-05-22 02:31:03,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:03,253 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 629 transitions. [2021-05-22 02:31:03,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:03,253 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 629 transitions. [2021-05-22 02:31:03,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:03,253 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:03,253 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:03,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4627,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:03,454 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:03,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:03,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1310922915, now seen corresponding path program 575 times [2021-05-22 02:31:03,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:03,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135105180] [2021-05-22 02:31:03,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:03,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:03,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135105180] [2021-05-22 02:31:03,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135105180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:03,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691889939] [2021-05-22 02:31:03,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:03,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:31:03,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:03,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:31:03,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:04,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691889939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:04,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:04,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:04,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917291972] [2021-05-22 02:31:04,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:04,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:04,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:04,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:04,037 INFO L87 Difference]: Start difference. First operand 282 states and 629 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:04,808 INFO L93 Difference]: Finished difference Result 351 states and 752 transitions. [2021-05-22 02:31:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:31:04,808 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:04,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:04,809 INFO L225 Difference]: With dead ends: 351 [2021-05-22 02:31:04,809 INFO L226 Difference]: Without dead ends: 332 [2021-05-22 02:31:04,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 972.8ms TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:31:04,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-22 02:31:04,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 284. [2021-05-22 02:31:04,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.243816254416961) internal successors, (635), 283 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:04,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 635 transitions. [2021-05-22 02:31:04,811 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 635 transitions. Word has length 20 [2021-05-22 02:31:04,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:04,811 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 635 transitions. [2021-05-22 02:31:04,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:04,811 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 635 transitions. [2021-05-22 02:31:04,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:04,812 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:04,812 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:05,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4640 [2021-05-22 02:31:05,012 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:05,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:05,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1275298075, now seen corresponding path program 576 times [2021-05-22 02:31:05,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:05,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415979930] [2021-05-22 02:31:05,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:05,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:05,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415979930] [2021-05-22 02:31:05,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415979930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:05,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582600596] [2021-05-22 02:31:05,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:05,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:31:05,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:05,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:31:05,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:05,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582600596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:05,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:05,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:05,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904304124] [2021-05-22 02:31:05,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:05,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:05,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:05,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:05,641 INFO L87 Difference]: Start difference. First operand 284 states and 635 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:06,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:06,233 INFO L93 Difference]: Finished difference Result 330 states and 717 transitions. [2021-05-22 02:31:06,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:31:06,233 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:06,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:06,234 INFO L225 Difference]: With dead ends: 330 [2021-05-22 02:31:06,234 INFO L226 Difference]: Without dead ends: 312 [2021-05-22 02:31:06,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 868.0ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:31:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-05-22 02:31:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 284. [2021-05-22 02:31:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.243816254416961) internal successors, (635), 283 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:06,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 635 transitions. [2021-05-22 02:31:06,236 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 635 transitions. Word has length 20 [2021-05-22 02:31:06,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:06,236 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 635 transitions. [2021-05-22 02:31:06,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:06,236 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 635 transitions. [2021-05-22 02:31:06,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:06,237 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:06,237 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:06,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4652,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:06,437 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:06,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2072033827, now seen corresponding path program 577 times [2021-05-22 02:31:06,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:06,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366685087] [2021-05-22 02:31:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:06,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:06,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:06,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366685087] [2021-05-22 02:31:06,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366685087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:06,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409842586] [2021-05-22 02:31:06,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:06,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:06,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409842586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:06,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:06,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:06,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043572959] [2021-05-22 02:31:06,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:06,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:06,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:06,989 INFO L87 Difference]: Start difference. First operand 284 states and 635 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:07,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:07,986 INFO L93 Difference]: Finished difference Result 354 states and 750 transitions. [2021-05-22 02:31:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:31:07,986 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:07,987 INFO L225 Difference]: With dead ends: 354 [2021-05-22 02:31:07,987 INFO L226 Difference]: Without dead ends: 332 [2021-05-22 02:31:07,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1112.4ms TimeCoverageRelationStatistics Valid=195, Invalid=1287, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:31:07,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-22 02:31:07,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 285. [2021-05-22 02:31:07,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.242957746478873) internal successors, (637), 284 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:07,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 637 transitions. [2021-05-22 02:31:07,989 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 637 transitions. Word has length 20 [2021-05-22 02:31:07,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:07,989 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 637 transitions. [2021-05-22 02:31:07,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:07,989 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 637 transitions. [2021-05-22 02:31:07,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:07,990 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:07,990 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:08,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4664,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:08,190 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:08,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:08,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1716587203, now seen corresponding path program 578 times [2021-05-22 02:31:08,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:08,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812965427] [2021-05-22 02:31:08,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:08,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:08,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812965427] [2021-05-22 02:31:08,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812965427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:08,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447793034] [2021-05-22 02:31:08,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:08,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:31:08,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:08,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:31:08,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:08,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447793034] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:08,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:08,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:08,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790397278] [2021-05-22 02:31:08,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:08,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:08,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:08,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:08,800 INFO L87 Difference]: Start difference. First operand 285 states and 637 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:09,470 INFO L93 Difference]: Finished difference Result 352 states and 756 transitions. [2021-05-22 02:31:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:31:09,471 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:09,471 INFO L225 Difference]: With dead ends: 352 [2021-05-22 02:31:09,471 INFO L226 Difference]: Without dead ends: 333 [2021-05-22 02:31:09,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 881.1ms TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:31:09,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-22 02:31:09,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 285. [2021-05-22 02:31:09,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.242957746478873) internal successors, (637), 284 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 637 transitions. [2021-05-22 02:31:09,473 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 637 transitions. Word has length 20 [2021-05-22 02:31:09,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:09,474 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 637 transitions. [2021-05-22 02:31:09,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 637 transitions. [2021-05-22 02:31:09,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:09,474 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:09,474 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:09,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4677,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:09,674 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:09,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:09,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1095245155, now seen corresponding path program 579 times [2021-05-22 02:31:09,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:09,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850943094] [2021-05-22 02:31:09,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:09,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:09,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850943094] [2021-05-22 02:31:09,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850943094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:09,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056634696] [2021-05-22 02:31:09,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:09,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:31:09,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:09,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-22 02:31:09,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:10,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056634696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:10,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:10,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:10,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69633867] [2021-05-22 02:31:10,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:10,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:10,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:10,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:10,342 INFO L87 Difference]: Start difference. First operand 285 states and 637 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:11,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:11,777 INFO L93 Difference]: Finished difference Result 425 states and 870 transitions. [2021-05-22 02:31:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:31:11,777 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:11,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:11,778 INFO L225 Difference]: With dead ends: 425 [2021-05-22 02:31:11,778 INFO L226 Difference]: Without dead ends: 348 [2021-05-22 02:31:11,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1588.1ms TimeCoverageRelationStatistics Valid=260, Invalid=1546, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:31:11,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-22 02:31:11,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 290. [2021-05-22 02:31:11,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.245674740484429) internal successors, (649), 289 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:11,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 649 transitions. [2021-05-22 02:31:11,781 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 649 transitions. Word has length 20 [2021-05-22 02:31:11,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:11,781 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 649 transitions. [2021-05-22 02:31:11,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:11,781 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 649 transitions. [2021-05-22 02:31:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:11,781 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:11,781 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:11,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4689,580 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:11,981 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:11,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:11,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1687729479, now seen corresponding path program 580 times [2021-05-22 02:31:11,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:11,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128741193] [2021-05-22 02:31:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:12,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:12,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128741193] [2021-05-22 02:31:12,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128741193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:12,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300356449] [2021-05-22 02:31:12,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:12,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:31:12,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:12,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:12,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:12,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300356449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:12,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:12,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:31:12,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99806618] [2021-05-22 02:31:12,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:31:12,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:12,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:31:12,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:31:12,607 INFO L87 Difference]: Start difference. First operand 290 states and 649 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:13,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:13,513 INFO L93 Difference]: Finished difference Result 336 states and 734 transitions. [2021-05-22 02:31:13,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:31:13,514 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:13,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:13,514 INFO L225 Difference]: With dead ends: 336 [2021-05-22 02:31:13,514 INFO L226 Difference]: Without dead ends: 329 [2021-05-22 02:31:13,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1091.4ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:31:13,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-05-22 02:31:13,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 294. [2021-05-22 02:31:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.242320819112628) internal successors, (657), 293 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:13,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 657 transitions. [2021-05-22 02:31:13,517 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 657 transitions. Word has length 20 [2021-05-22 02:31:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:13,517 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 657 transitions. [2021-05-22 02:31:13,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:13,517 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 657 transitions. [2021-05-22 02:31:13,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:13,517 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:13,517 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:13,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4701,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:13,718 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:13,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:13,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1389676521, now seen corresponding path program 581 times [2021-05-22 02:31:13,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:13,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798432668] [2021-05-22 02:31:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:13,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:13,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798432668] [2021-05-22 02:31:13,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798432668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:13,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916920379] [2021-05-22 02:31:13,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:13,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:31:13,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:13,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:13,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:14,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916920379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:14,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:14,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:31:14,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011250858] [2021-05-22 02:31:14,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:31:14,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:14,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:31:14,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:31:14,411 INFO L87 Difference]: Start difference. First operand 294 states and 657 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:14,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:14,959 INFO L93 Difference]: Finished difference Result 318 states and 690 transitions. [2021-05-22 02:31:14,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:31:14,959 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:14,960 INFO L225 Difference]: With dead ends: 318 [2021-05-22 02:31:14,960 INFO L226 Difference]: Without dead ends: 293 [2021-05-22 02:31:14,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 936.6ms TimeCoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:31:14,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-22 02:31:14,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-05-22 02:31:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.243150684931507) internal successors, (655), 292 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 655 transitions. [2021-05-22 02:31:14,962 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 655 transitions. Word has length 20 [2021-05-22 02:31:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:14,962 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 655 transitions. [2021-05-22 02:31:14,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:14,962 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 655 transitions. [2021-05-22 02:31:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:14,963 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:14,963 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:15,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4716 [2021-05-22 02:31:15,163 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:15,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:15,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1252337401, now seen corresponding path program 582 times [2021-05-22 02:31:15,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:15,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864154750] [2021-05-22 02:31:15,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:15,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:15,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864154750] [2021-05-22 02:31:15,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864154750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:15,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999913769] [2021-05-22 02:31:15,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:15,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:31:15,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:15,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:31:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:15,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999913769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:15,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:15,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:31:15,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520333946] [2021-05-22 02:31:15,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:31:15,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:15,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:31:15,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:31:15,972 INFO L87 Difference]: Start difference. First operand 293 states and 655 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:16,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:16,650 INFO L93 Difference]: Finished difference Result 308 states and 677 transitions. [2021-05-22 02:31:16,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:31:16,651 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:16,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:16,651 INFO L225 Difference]: With dead ends: 308 [2021-05-22 02:31:16,651 INFO L226 Difference]: Without dead ends: 295 [2021-05-22 02:31:16,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1131.3ms TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:31:16,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-05-22 02:31:16,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2021-05-22 02:31:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.242320819112628) internal successors, (657), 293 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:16,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 657 transitions. [2021-05-22 02:31:16,653 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 657 transitions. Word has length 20 [2021-05-22 02:31:16,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:16,654 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 657 transitions. [2021-05-22 02:31:16,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:16,654 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 657 transitions. [2021-05-22 02:31:16,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:16,654 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:16,654 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:16,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4728 [2021-05-22 02:31:16,854 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:16,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:16,854 INFO L82 PathProgramCache]: Analyzing trace with hash -325004329, now seen corresponding path program 583 times [2021-05-22 02:31:16,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:16,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092466719] [2021-05-22 02:31:16,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:17,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:17,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092466719] [2021-05-22 02:31:17,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092466719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:17,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756448389] [2021-05-22 02:31:17,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:17,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:17,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:17,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:17,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756448389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:17,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:17,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:31:17,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183992470] [2021-05-22 02:31:17,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:31:17,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:17,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:31:17,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=595, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:31:17,631 INFO L87 Difference]: Start difference. First operand 294 states and 657 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:19,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:19,142 INFO L93 Difference]: Finished difference Result 342 states and 735 transitions. [2021-05-22 02:31:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:31:19,142 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:19,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:19,142 INFO L225 Difference]: With dead ends: 342 [2021-05-22 02:31:19,142 INFO L226 Difference]: Without dead ends: 321 [2021-05-22 02:31:19,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1768.6ms TimeCoverageRelationStatistics Valid=170, Invalid=1636, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:31:19,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-22 02:31:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 291. [2021-05-22 02:31:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.2448275862068967) internal successors, (651), 290 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 651 transitions. [2021-05-22 02:31:19,145 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 651 transitions. Word has length 20 [2021-05-22 02:31:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:19,145 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 651 transitions. [2021-05-22 02:31:19,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:19,145 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 651 transitions. [2021-05-22 02:31:19,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:19,145 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:19,145 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:19,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4740,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:19,346 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:19,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:19,346 INFO L82 PathProgramCache]: Analyzing trace with hash -122219343, now seen corresponding path program 584 times [2021-05-22 02:31:19,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:19,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109010535] [2021-05-22 02:31:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:19,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:19,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109010535] [2021-05-22 02:31:19,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109010535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:19,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558374491] [2021-05-22 02:31:19,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:19,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:31:19,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:19,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:31:19,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:20,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558374491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:20,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:20,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:31:20,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930164188] [2021-05-22 02:31:20,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:31:20,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:20,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:31:20,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:31:20,067 INFO L87 Difference]: Start difference. First operand 291 states and 651 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:20,559 INFO L93 Difference]: Finished difference Result 308 states and 676 transitions. [2021-05-22 02:31:20,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:31:20,559 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:20,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:20,559 INFO L225 Difference]: With dead ends: 308 [2021-05-22 02:31:20,559 INFO L226 Difference]: Without dead ends: 293 [2021-05-22 02:31:20,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 917.7ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:31:20,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-22 02:31:20,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-05-22 02:31:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.243150684931507) internal successors, (655), 292 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 655 transitions. [2021-05-22 02:31:20,562 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 655 transitions. Word has length 20 [2021-05-22 02:31:20,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:20,562 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 655 transitions. [2021-05-22 02:31:20,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:20,562 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 655 transitions. [2021-05-22 02:31:20,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:20,562 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:20,562 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:20,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4755 [2021-05-22 02:31:20,763 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:20,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:20,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1775172717, now seen corresponding path program 585 times [2021-05-22 02:31:20,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:20,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139541370] [2021-05-22 02:31:20,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:20,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:20,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139541370] [2021-05-22 02:31:20,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139541370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:20,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607493361] [2021-05-22 02:31:20,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:20,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:31:20,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:20,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:20,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:21,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607493361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:21,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:21,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:31:21,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341744126] [2021-05-22 02:31:21,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:31:21,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:21,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:31:21,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:31:21,388 INFO L87 Difference]: Start difference. First operand 293 states and 655 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:22,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:22,273 INFO L93 Difference]: Finished difference Result 326 states and 714 transitions. [2021-05-22 02:31:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:31:22,274 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:22,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:22,274 INFO L225 Difference]: With dead ends: 326 [2021-05-22 02:31:22,274 INFO L226 Difference]: Without dead ends: 319 [2021-05-22 02:31:22,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1124.0ms TimeCoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:31:22,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-05-22 02:31:22,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 294. [2021-05-22 02:31:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.2457337883959045) internal successors, (658), 293 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:22,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 658 transitions. [2021-05-22 02:31:22,276 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 658 transitions. Word has length 20 [2021-05-22 02:31:22,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:22,276 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 658 transitions. [2021-05-22 02:31:22,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 658 transitions. [2021-05-22 02:31:22,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:22,277 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:22,277 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:22,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4767,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:22,477 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:22,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:22,478 INFO L82 PathProgramCache]: Analyzing trace with hash 942452849, now seen corresponding path program 586 times [2021-05-22 02:31:22,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:22,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138171879] [2021-05-22 02:31:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:22,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:22,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138171879] [2021-05-22 02:31:22,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138171879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:22,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143241362] [2021-05-22 02:31:22,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:22,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:31:22,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:22,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:22,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:23,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143241362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:23,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:23,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:31:23,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571602371] [2021-05-22 02:31:23,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:31:23,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:23,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:31:23,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:31:23,281 INFO L87 Difference]: Start difference. First operand 294 states and 658 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:24,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:24,347 INFO L93 Difference]: Finished difference Result 347 states and 739 transitions. [2021-05-22 02:31:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:31:24,348 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:24,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:24,348 INFO L225 Difference]: With dead ends: 347 [2021-05-22 02:31:24,348 INFO L226 Difference]: Without dead ends: 316 [2021-05-22 02:31:24,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1442.8ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:31:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-22 02:31:24,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 292. [2021-05-22 02:31:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.2439862542955327) internal successors, (653), 291 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:24,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 653 transitions. [2021-05-22 02:31:24,351 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 653 transitions. Word has length 20 [2021-05-22 02:31:24,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:24,351 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 653 transitions. [2021-05-22 02:31:24,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:24,351 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 653 transitions. [2021-05-22 02:31:24,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:24,351 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:24,351 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:24,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4782 [2021-05-22 02:31:24,551 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:24,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:24,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1036659641, now seen corresponding path program 587 times [2021-05-22 02:31:24,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:24,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975988079] [2021-05-22 02:31:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:24,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:24,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:24,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975988079] [2021-05-22 02:31:24,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975988079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:24,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044810412] [2021-05-22 02:31:24,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:24,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:31:24,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:24,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:31:24,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:25,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044810412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:25,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:25,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:31:25,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030710970] [2021-05-22 02:31:25,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:31:25,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:25,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:31:25,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:31:25,255 INFO L87 Difference]: Start difference. First operand 292 states and 653 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:25,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:25,746 INFO L93 Difference]: Finished difference Result 309 states and 679 transitions. [2021-05-22 02:31:25,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:31:25,746 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:25,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:25,747 INFO L225 Difference]: With dead ends: 309 [2021-05-22 02:31:25,747 INFO L226 Difference]: Without dead ends: 296 [2021-05-22 02:31:25,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 859.6ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:31:25,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-05-22 02:31:25,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 294. [2021-05-22 02:31:25,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.242320819112628) internal successors, (657), 293 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:25,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 657 transitions. [2021-05-22 02:31:25,749 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 657 transitions. Word has length 20 [2021-05-22 02:31:25,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:25,749 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 657 transitions. [2021-05-22 02:31:25,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 657 transitions. [2021-05-22 02:31:25,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:25,750 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:25,750 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:25,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 588 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4794 [2021-05-22 02:31:25,950 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:25,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash -540682089, now seen corresponding path program 588 times [2021-05-22 02:31:25,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:25,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64485941] [2021-05-22 02:31:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:26,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:26,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64485941] [2021-05-22 02:31:26,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64485941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:26,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94958267] [2021-05-22 02:31:26,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:26,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:31:26,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:26,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:26,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:26,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94958267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:26,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:26,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:31:26,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075719773] [2021-05-22 02:31:26,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:31:26,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:26,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:31:26,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:31:26,633 INFO L87 Difference]: Start difference. First operand 294 states and 657 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:27,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:27,856 INFO L93 Difference]: Finished difference Result 342 states and 735 transitions. [2021-05-22 02:31:27,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:31:27,856 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:27,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:27,857 INFO L225 Difference]: With dead ends: 342 [2021-05-22 02:31:27,857 INFO L226 Difference]: Without dead ends: 321 [2021-05-22 02:31:27,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1466.6ms TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:31:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-22 02:31:27,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 293. [2021-05-22 02:31:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.243150684931507) internal successors, (655), 292 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 655 transitions. [2021-05-22 02:31:27,859 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 655 transitions. Word has length 20 [2021-05-22 02:31:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:27,859 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 655 transitions. [2021-05-22 02:31:27,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 655 transitions. [2021-05-22 02:31:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:27,860 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:27,860 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:28,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4806 [2021-05-22 02:31:28,060 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:28,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:28,060 INFO L82 PathProgramCache]: Analyzing trace with hash -34335823, now seen corresponding path program 589 times [2021-05-22 02:31:28,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:28,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186105683] [2021-05-22 02:31:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:28,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:28,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186105683] [2021-05-22 02:31:28,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186105683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:28,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381903510] [2021-05-22 02:31:28,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:28,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:28,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:28,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381903510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:28,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:28,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:31:28,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118450333] [2021-05-22 02:31:28,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:31:28,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:28,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:31:28,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:31:28,716 INFO L87 Difference]: Start difference. First operand 293 states and 655 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:30,030 INFO L93 Difference]: Finished difference Result 388 states and 813 transitions. [2021-05-22 02:31:30,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:31:30,031 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:30,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:30,031 INFO L225 Difference]: With dead ends: 388 [2021-05-22 02:31:30,031 INFO L226 Difference]: Without dead ends: 363 [2021-05-22 02:31:30,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1526.1ms TimeCoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:31:30,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-22 02:31:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 297. [2021-05-22 02:31:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.2567567567567566) internal successors, (668), 296 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 668 transitions. [2021-05-22 02:31:30,033 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 668 transitions. Word has length 20 [2021-05-22 02:31:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:30,034 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 668 transitions. [2021-05-22 02:31:30,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 668 transitions. [2021-05-22 02:31:30,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:30,034 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:30,034 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:30,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4821 [2021-05-22 02:31:30,234 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:30,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:30,235 INFO L82 PathProgramCache]: Analyzing trace with hash 762399929, now seen corresponding path program 590 times [2021-05-22 02:31:30,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:30,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375052792] [2021-05-22 02:31:30,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:30,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:30,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375052792] [2021-05-22 02:31:30,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375052792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:30,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825676428] [2021-05-22 02:31:30,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:30,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:31:30,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:30,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:31:30,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:30,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825676428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:30,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:30,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:31:30,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431125048] [2021-05-22 02:31:30,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:31:30,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:30,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:31:30,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:31:30,828 INFO L87 Difference]: Start difference. First operand 297 states and 668 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:31,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:31,484 INFO L93 Difference]: Finished difference Result 364 states and 787 transitions. [2021-05-22 02:31:31,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:31:31,484 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:31,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:31,485 INFO L225 Difference]: With dead ends: 364 [2021-05-22 02:31:31,485 INFO L226 Difference]: Without dead ends: 345 [2021-05-22 02:31:31,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 802.1ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:31:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-22 02:31:31,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 297. [2021-05-22 02:31:31,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.2567567567567566) internal successors, (668), 296 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 668 transitions. [2021-05-22 02:31:31,487 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 668 transitions. Word has length 20 [2021-05-22 02:31:31,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:31,487 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 668 transitions. [2021-05-22 02:31:31,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:31,487 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 668 transitions. [2021-05-22 02:31:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:31,488 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:31,488 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:31,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4833,591 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:31,688 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:31,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:31,688 INFO L82 PathProgramCache]: Analyzing trace with hash 514247511, now seen corresponding path program 591 times [2021-05-22 02:31:31,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:31,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798672093] [2021-05-22 02:31:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:32,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:32,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798672093] [2021-05-22 02:31:32,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798672093] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:32,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731867646] [2021-05-22 02:31:32,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:32,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:31:32,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:32,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-22 02:31:32,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:32,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731867646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:32,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:32,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:32,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008500780] [2021-05-22 02:31:32,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:32,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:32,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:32,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:32,415 INFO L87 Difference]: Start difference. First operand 297 states and 668 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:32,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:32,821 INFO L93 Difference]: Finished difference Result 315 states and 695 transitions. [2021-05-22 02:31:32,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:31:32,821 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:32,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:32,821 INFO L225 Difference]: With dead ends: 315 [2021-05-22 02:31:32,821 INFO L226 Difference]: Without dead ends: 300 [2021-05-22 02:31:32,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 801.7ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:31:32,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-22 02:31:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2021-05-22 02:31:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.254180602006689) internal successors, (674), 299 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:32,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 674 transitions. [2021-05-22 02:31:32,824 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 674 transitions. Word has length 20 [2021-05-22 02:31:32,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:32,824 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 674 transitions. [2021-05-22 02:31:32,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 674 transitions. [2021-05-22 02:31:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:32,824 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:32,824 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:33,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4845 [2021-05-22 02:31:33,039 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:33,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:33,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1138705863, now seen corresponding path program 592 times [2021-05-22 02:31:33,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:33,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356195687] [2021-05-22 02:31:33,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:33,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:33,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356195687] [2021-05-22 02:31:33,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356195687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:33,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690712082] [2021-05-22 02:31:33,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:33,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:31:33,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:33,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:33,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:33,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690712082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:33,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:33,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:33,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609876261] [2021-05-22 02:31:33,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:33,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:33,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:33,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:33,731 INFO L87 Difference]: Start difference. First operand 300 states and 674 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:34,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:34,330 INFO L93 Difference]: Finished difference Result 325 states and 711 transitions. [2021-05-22 02:31:34,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:31:34,331 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:34,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:34,331 INFO L225 Difference]: With dead ends: 325 [2021-05-22 02:31:34,331 INFO L226 Difference]: Without dead ends: 318 [2021-05-22 02:31:34,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 947.6ms TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:31:34,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-22 02:31:34,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 301. [2021-05-22 02:31:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.256666666666667) internal successors, (677), 300 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:34,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 677 transitions. [2021-05-22 02:31:34,334 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 677 transitions. Word has length 20 [2021-05-22 02:31:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:34,334 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 677 transitions. [2021-05-22 02:31:34,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 677 transitions. [2021-05-22 02:31:34,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:34,334 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:34,334 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:34,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4859,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:34,537 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1578919703, now seen corresponding path program 593 times [2021-05-22 02:31:34,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:34,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175201455] [2021-05-22 02:31:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:34,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:34,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175201455] [2021-05-22 02:31:34,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175201455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:34,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256111611] [2021-05-22 02:31:34,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:34,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:31:34,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:34,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:34,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:35,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256111611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:35,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:35,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:35,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698849625] [2021-05-22 02:31:35,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:35,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:35,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:35,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:35,261 INFO L87 Difference]: Start difference. First operand 301 states and 677 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:36,319 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2021-05-22 02:31:36,583 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2021-05-22 02:31:36,749 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2021-05-22 02:31:37,233 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-05-22 02:31:37,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:37,540 INFO L93 Difference]: Finished difference Result 380 states and 812 transitions. [2021-05-22 02:31:37,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-22 02:31:37,540 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:37,541 INFO L225 Difference]: With dead ends: 380 [2021-05-22 02:31:37,541 INFO L226 Difference]: Without dead ends: 356 [2021-05-22 02:31:37,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 2546.6ms TimeCoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:31:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-05-22 02:31:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 303. [2021-05-22 02:31:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.2582781456953644) internal successors, (682), 302 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:37,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 682 transitions. [2021-05-22 02:31:37,543 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 682 transitions. Word has length 20 [2021-05-22 02:31:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:37,543 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 682 transitions. [2021-05-22 02:31:37,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:37,544 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 682 transitions. [2021-05-22 02:31:37,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:37,544 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:37,544 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:37,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4874,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:37,744 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:37,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:37,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1381456263, now seen corresponding path program 594 times [2021-05-22 02:31:37,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:37,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725920461] [2021-05-22 02:31:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:37,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:37,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725920461] [2021-05-22 02:31:37,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725920461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:37,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179193257] [2021-05-22 02:31:37,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:37,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:31:37,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:37,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:31:37,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:38,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179193257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:38,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:38,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:38,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654927425] [2021-05-22 02:31:38,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:38,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:38,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:38,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:38,423 INFO L87 Difference]: Start difference. First operand 303 states and 682 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:38,977 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-05-22 02:31:39,269 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-05-22 02:31:39,535 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-05-22 02:31:39,762 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-05-22 02:31:40,116 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-05-22 02:31:40,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:40,193 INFO L93 Difference]: Finished difference Result 384 states and 824 transitions. [2021-05-22 02:31:40,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:31:40,193 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:40,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:40,194 INFO L225 Difference]: With dead ends: 384 [2021-05-22 02:31:40,194 INFO L226 Difference]: Without dead ends: 365 [2021-05-22 02:31:40,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2011.8ms TimeCoverageRelationStatistics Valid=248, Invalid=1558, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:31:40,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-05-22 02:31:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 299. [2021-05-22 02:31:40,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.2550335570469797) internal successors, (672), 298 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 672 transitions. [2021-05-22 02:31:40,196 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 672 transitions. Word has length 20 [2021-05-22 02:31:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:40,196 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 672 transitions. [2021-05-22 02:31:40,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 672 transitions. [2021-05-22 02:31:40,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:40,197 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:40,197 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:40,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4889 [2021-05-22 02:31:40,397 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:40,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1673126495, now seen corresponding path program 595 times [2021-05-22 02:31:40,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:40,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767392354] [2021-05-22 02:31:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:40,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:40,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767392354] [2021-05-22 02:31:40,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767392354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:40,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654192145] [2021-05-22 02:31:40,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:40,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:40,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:41,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654192145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:41,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:41,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:41,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928774654] [2021-05-22 02:31:41,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:41,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:41,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:41,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:41,073 INFO L87 Difference]: Start difference. First operand 299 states and 672 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:41,478 INFO L93 Difference]: Finished difference Result 314 states and 694 transitions. [2021-05-22 02:31:41,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:31:41,479 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:41,479 INFO L225 Difference]: With dead ends: 314 [2021-05-22 02:31:41,479 INFO L226 Difference]: Without dead ends: 301 [2021-05-22 02:31:41,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 789.7ms TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:31:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-05-22 02:31:41,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2021-05-22 02:31:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.2533333333333334) internal successors, (676), 300 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:41,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 676 transitions. [2021-05-22 02:31:41,481 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 676 transitions. Word has length 20 [2021-05-22 02:31:41,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:41,481 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 676 transitions. [2021-05-22 02:31:41,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 676 transitions. [2021-05-22 02:31:41,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:41,482 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:41,482 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:41,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4902,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:41,682 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:41,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:41,682 INFO L82 PathProgramCache]: Analyzing trace with hash 95784765, now seen corresponding path program 596 times [2021-05-22 02:31:41,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:41,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026373295] [2021-05-22 02:31:41,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:41,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:41,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026373295] [2021-05-22 02:31:41,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026373295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:41,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566961347] [2021-05-22 02:31:41,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:41,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:31:41,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:41,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:31:41,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:42,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566961347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:42,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:42,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:42,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833149197] [2021-05-22 02:31:42,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:42,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:42,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:42,345 INFO L87 Difference]: Start difference. First operand 301 states and 676 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:43,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:43,048 INFO L93 Difference]: Finished difference Result 327 states and 717 transitions. [2021-05-22 02:31:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:31:43,048 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:43,048 INFO L225 Difference]: With dead ends: 327 [2021-05-22 02:31:43,048 INFO L226 Difference]: Without dead ends: 316 [2021-05-22 02:31:43,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 956.9ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:31:43,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-22 02:31:43,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 302. [2021-05-22 02:31:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.2524916943521593) internal successors, (678), 301 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 678 transitions. [2021-05-22 02:31:43,051 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 678 transitions. Word has length 20 [2021-05-22 02:31:43,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:43,051 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 678 transitions. [2021-05-22 02:31:43,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 678 transitions. [2021-05-22 02:31:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:43,051 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:43,051 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:43,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4914 [2021-05-22 02:31:43,252 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:43,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:43,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1430376095, now seen corresponding path program 597 times [2021-05-22 02:31:43,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:43,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333330119] [2021-05-22 02:31:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:43,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:43,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333330119] [2021-05-22 02:31:43,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333330119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:43,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936987443] [2021-05-22 02:31:43,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:43,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:31:43,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:43,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:31:43,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:43,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936987443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:43,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:43,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:43,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404023259] [2021-05-22 02:31:43,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:43,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:43,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:43,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:43,801 INFO L87 Difference]: Start difference. First operand 302 states and 678 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:44,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:44,854 INFO L93 Difference]: Finished difference Result 373 states and 802 transitions. [2021-05-22 02:31:44,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:31:44,854 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:44,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:44,854 INFO L225 Difference]: With dead ends: 373 [2021-05-22 02:31:44,854 INFO L226 Difference]: Without dead ends: 354 [2021-05-22 02:31:44,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1246.4ms TimeCoverageRelationStatistics Valid=220, Invalid=1502, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:31:44,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-05-22 02:31:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 303. [2021-05-22 02:31:44,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.251655629139073) internal successors, (680), 302 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:44,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 680 transitions. [2021-05-22 02:31:44,857 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 680 transitions. Word has length 20 [2021-05-22 02:31:44,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:44,857 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 680 transitions. [2021-05-22 02:31:44,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:44,857 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 680 transitions. [2021-05-22 02:31:44,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:44,857 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:44,857 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:45,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4926,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:45,058 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:45,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:45,058 INFO L82 PathProgramCache]: Analyzing trace with hash 602131031, now seen corresponding path program 598 times [2021-05-22 02:31:45,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:45,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228520069] [2021-05-22 02:31:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:45,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:45,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228520069] [2021-05-22 02:31:45,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228520069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:45,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10724956] [2021-05-22 02:31:45,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:45,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:31:45,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:45,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:45,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:45,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10724956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:45,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:45,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:45,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049500937] [2021-05-22 02:31:45,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:45,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:45,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:45,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:45,686 INFO L87 Difference]: Start difference. First operand 303 states and 680 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:46,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:46,362 INFO L93 Difference]: Finished difference Result 356 states and 766 transitions. [2021-05-22 02:31:46,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:31:46,363 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:46,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:46,363 INFO L225 Difference]: With dead ends: 356 [2021-05-22 02:31:46,363 INFO L226 Difference]: Without dead ends: 338 [2021-05-22 02:31:46,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 960.2ms TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:31:46,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-22 02:31:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 305. [2021-05-22 02:31:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.25) internal successors, (684), 304 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 684 transitions. [2021-05-22 02:31:46,366 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 684 transitions. Word has length 20 [2021-05-22 02:31:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:46,366 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 684 transitions. [2021-05-22 02:31:46,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 684 transitions. [2021-05-22 02:31:46,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:46,366 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:46,366 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:46,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4938 [2021-05-22 02:31:46,567 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:46,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:46,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1936722361, now seen corresponding path program 599 times [2021-05-22 02:31:46,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:46,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890205417] [2021-05-22 02:31:46,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:46,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:46,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890205417] [2021-05-22 02:31:46,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890205417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:46,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765168255] [2021-05-22 02:31:46,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:46,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:31:46,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:46,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:31:46,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:47,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765168255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:47,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:47,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:47,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598090334] [2021-05-22 02:31:47,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:47,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:47,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:47,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:47,183 INFO L87 Difference]: Start difference. First operand 305 states and 684 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:47,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:47,966 INFO L93 Difference]: Finished difference Result 374 states and 801 transitions. [2021-05-22 02:31:47,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:31:47,966 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:47,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:47,967 INFO L225 Difference]: With dead ends: 374 [2021-05-22 02:31:47,967 INFO L226 Difference]: Without dead ends: 355 [2021-05-22 02:31:47,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1012.0ms TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:31:47,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-05-22 02:31:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 306. [2021-05-22 02:31:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.2491803278688525) internal successors, (686), 305 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:47,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 686 transitions. [2021-05-22 02:31:47,969 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 686 transitions. Word has length 20 [2021-05-22 02:31:47,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:47,969 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 686 transitions. [2021-05-22 02:31:47,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 686 transitions. [2021-05-22 02:31:47,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:47,970 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:47,970 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:48,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4950,600 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:48,170 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:48,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:48,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1398866783, now seen corresponding path program 600 times [2021-05-22 02:31:48,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:48,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713401839] [2021-05-22 02:31:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:48,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:48,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713401839] [2021-05-22 02:31:48,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713401839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:48,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029203336] [2021-05-22 02:31:48,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:48,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:31:48,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:48,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:48,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:48,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029203336] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:48,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:48,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:48,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671828764] [2021-05-22 02:31:48,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:48,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:48,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:48,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:48,692 INFO L87 Difference]: Start difference. First operand 306 states and 686 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:49,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:49,291 INFO L93 Difference]: Finished difference Result 369 states and 798 transitions. [2021-05-22 02:31:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:31:49,291 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:49,292 INFO L225 Difference]: With dead ends: 369 [2021-05-22 02:31:49,292 INFO L226 Difference]: Without dead ends: 350 [2021-05-22 02:31:49,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 696.6ms TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:31:49,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-22 02:31:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 306. [2021-05-22 02:31:49,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.2491803278688525) internal successors, (686), 305 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 686 transitions. [2021-05-22 02:31:49,297 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 686 transitions. Word has length 20 [2021-05-22 02:31:49,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:49,297 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 686 transitions. [2021-05-22 02:31:49,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:49,297 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 686 transitions. [2021-05-22 02:31:49,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:49,298 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:49,298 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:49,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4963,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:49,498 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:49,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:49,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1354383623, now seen corresponding path program 601 times [2021-05-22 02:31:49,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:49,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412902711] [2021-05-22 02:31:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:49,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:49,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412902711] [2021-05-22 02:31:49,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412902711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:49,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305769334] [2021-05-22 02:31:49,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:49,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:49,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:50,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305769334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:50,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:50,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:50,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029571888] [2021-05-22 02:31:50,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:50,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:50,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:50,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:50,127 INFO L87 Difference]: Start difference. First operand 306 states and 686 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:50,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:50,397 INFO L93 Difference]: Finished difference Result 322 states and 710 transitions. [2021-05-22 02:31:50,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:31:50,398 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:50,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:50,398 INFO L225 Difference]: With dead ends: 322 [2021-05-22 02:31:50,398 INFO L226 Difference]: Without dead ends: 309 [2021-05-22 02:31:50,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 627.1ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:31:50,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-22 02:31:50,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2021-05-22 02:31:50,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.2467532467532467) internal successors, (692), 308 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 692 transitions. [2021-05-22 02:31:50,400 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 692 transitions. Word has length 20 [2021-05-22 02:31:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:50,400 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 692 transitions. [2021-05-22 02:31:50,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 692 transitions. [2021-05-22 02:31:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:50,401 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:50,401 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:50,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4975,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:50,601 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:50,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:50,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1363241943, now seen corresponding path program 602 times [2021-05-22 02:31:50,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:50,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932933198] [2021-05-22 02:31:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:50,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:50,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932933198] [2021-05-22 02:31:50,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932933198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:50,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949717286] [2021-05-22 02:31:50,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:50,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:31:50,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:50,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:31:50,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:51,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949717286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:51,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:51,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:51,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315087846] [2021-05-22 02:31:51,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:51,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:51,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:51,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:51,273 INFO L87 Difference]: Start difference. First operand 309 states and 692 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:51,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:51,938 INFO L93 Difference]: Finished difference Result 337 states and 737 transitions. [2021-05-22 02:31:51,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:31:51,939 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:51,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:51,939 INFO L225 Difference]: With dead ends: 337 [2021-05-22 02:31:51,939 INFO L226 Difference]: Without dead ends: 326 [2021-05-22 02:31:51,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 960.0ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:31:51,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-22 02:31:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 310. [2021-05-22 02:31:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.2459546925566345) internal successors, (694), 309 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 694 transitions. [2021-05-22 02:31:51,942 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 694 transitions. Word has length 20 [2021-05-22 02:31:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:51,942 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 694 transitions. [2021-05-22 02:31:51,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 694 transitions. [2021-05-22 02:31:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:51,942 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:51,942 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:52,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4987 [2021-05-22 02:31:52,142 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:52,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:52,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1597134023, now seen corresponding path program 603 times [2021-05-22 02:31:52,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:52,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016627096] [2021-05-22 02:31:52,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:52,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:52,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016627096] [2021-05-22 02:31:52,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016627096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:52,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143569706] [2021-05-22 02:31:52,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:52,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:31:52,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:52,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-22 02:31:52,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:52,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:52,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143569706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:52,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:52,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:52,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812388214] [2021-05-22 02:31:52,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:52,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:52,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:52,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:52,761 INFO L87 Difference]: Start difference. First operand 310 states and 694 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:53,708 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-05-22 02:31:53,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:53,972 INFO L93 Difference]: Finished difference Result 406 states and 855 transitions. [2021-05-22 02:31:53,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:31:53,972 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:53,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:53,972 INFO L225 Difference]: With dead ends: 406 [2021-05-22 02:31:53,972 INFO L226 Difference]: Without dead ends: 380 [2021-05-22 02:31:53,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1413.7ms TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:31:53,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-22 02:31:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 308. [2021-05-22 02:31:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.247557003257329) internal successors, (690), 307 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 690 transitions. [2021-05-22 02:31:53,975 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 690 transitions. Word has length 20 [2021-05-22 02:31:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:53,975 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 690 transitions. [2021-05-22 02:31:53,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:53,975 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 690 transitions. [2021-05-22 02:31:53,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:53,975 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:53,976 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:54,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4999,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:54,189 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:54,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:54,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1869588209, now seen corresponding path program 604 times [2021-05-22 02:31:54,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:54,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979470487] [2021-05-22 02:31:54,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:54,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:54,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979470487] [2021-05-22 02:31:54,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979470487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:54,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821895131] [2021-05-22 02:31:54,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:54,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:31:54,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:54,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:31:54,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:54,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821895131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:54,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:54,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:54,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459941016] [2021-05-22 02:31:54,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:54,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:54,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:54,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:54,893 INFO L87 Difference]: Start difference. First operand 308 states and 690 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:56,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:56,415 INFO L93 Difference]: Finished difference Result 393 states and 830 transitions. [2021-05-22 02:31:56,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:31:56,416 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:56,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:56,416 INFO L225 Difference]: With dead ends: 393 [2021-05-22 02:31:56,416 INFO L226 Difference]: Without dead ends: 372 [2021-05-22 02:31:56,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1709.3ms TimeCoverageRelationStatistics Valid=211, Invalid=1681, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:31:56,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-05-22 02:31:56,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 310. [2021-05-22 02:31:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.249190938511327) internal successors, (695), 309 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 695 transitions. [2021-05-22 02:31:56,418 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 695 transitions. Word has length 20 [2021-05-22 02:31:56,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:56,418 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 695 transitions. [2021-05-22 02:31:56,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:56,419 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 695 transitions. [2021-05-22 02:31:56,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:56,419 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:56,419 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:56,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5014 [2021-05-22 02:31:56,619 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:56,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:56,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1628643335, now seen corresponding path program 605 times [2021-05-22 02:31:56,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:56,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505602046] [2021-05-22 02:31:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:56,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:56,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505602046] [2021-05-22 02:31:56,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505602046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:56,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327726126] [2021-05-22 02:31:56,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:56,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:31:56,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:56,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:31:56,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:57,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327726126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:57,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:57,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:57,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971848315] [2021-05-22 02:31:57,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:57,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:57,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:57,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:57,129 INFO L87 Difference]: Start difference. First operand 310 states and 695 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:57,719 INFO L93 Difference]: Finished difference Result 373 states and 807 transitions. [2021-05-22 02:31:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:31:57,719 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:57,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:57,720 INFO L225 Difference]: With dead ends: 373 [2021-05-22 02:31:57,720 INFO L226 Difference]: Without dead ends: 354 [2021-05-22 02:31:57,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 730.4ms TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:31:57,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-05-22 02:31:57,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 310. [2021-05-22 02:31:57,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.249190938511327) internal successors, (695), 309 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 695 transitions. [2021-05-22 02:31:57,723 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 695 transitions. Word has length 20 [2021-05-22 02:31:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:57,723 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 695 transitions. [2021-05-22 02:31:57,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 695 transitions. [2021-05-22 02:31:57,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:57,723 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:57,723 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:57,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5028,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:57,923 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:57,924 INFO L82 PathProgramCache]: Analyzing trace with hash 386453271, now seen corresponding path program 606 times [2021-05-22 02:31:57,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:57,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364334968] [2021-05-22 02:31:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:58,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:58,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364334968] [2021-05-22 02:31:58,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364334968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:58,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206409325] [2021-05-22 02:31:58,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:58,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:31:58,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:31:58,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:31:58,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:31:58,497 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-22 02:31:58,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:58,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206409325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:58,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:31:58,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:31:58,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012748590] [2021-05-22 02:31:58,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:31:58,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:31:58,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:31:58,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:31:58,613 INFO L87 Difference]: Start difference. First operand 310 states and 695 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:31:59,300 INFO L93 Difference]: Finished difference Result 357 states and 778 transitions. [2021-05-22 02:31:59,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:31:59,301 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:31:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:31:59,301 INFO L225 Difference]: With dead ends: 357 [2021-05-22 02:31:59,301 INFO L226 Difference]: Without dead ends: 339 [2021-05-22 02:31:59,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1021.3ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:31:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-05-22 02:31:59,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 313. [2021-05-22 02:31:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.246794871794872) internal successors, (701), 312 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 701 transitions. [2021-05-22 02:31:59,304 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 701 transitions. Word has length 20 [2021-05-22 02:31:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:31:59,304 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 701 transitions. [2021-05-22 02:31:59,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:31:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 701 transitions. [2021-05-22 02:31:59,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:31:59,304 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:31:59,304 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:31:59,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5041 [2021-05-22 02:31:59,509 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:31:59,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:31:59,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1721044601, now seen corresponding path program 607 times [2021-05-22 02:31:59,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:31:59,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751023482] [2021-05-22 02:31:59,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:31:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:31:59,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:31:59,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751023482] [2021-05-22 02:31:59,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751023482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:31:59,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752455530] [2021-05-22 02:31:59,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:31:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:31:59,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-22 02:31:59,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:00,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752455530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:00,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:00,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:00,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002861825] [2021-05-22 02:32:00,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:00,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:00,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:00,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:00,187 INFO L87 Difference]: Start difference. First operand 313 states and 701 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:01,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:01,322 INFO L93 Difference]: Finished difference Result 383 states and 817 transitions. [2021-05-22 02:32:01,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:32:01,323 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:01,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:01,323 INFO L225 Difference]: With dead ends: 383 [2021-05-22 02:32:01,323 INFO L226 Difference]: Without dead ends: 359 [2021-05-22 02:32:01,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1396.5ms TimeCoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:32:01,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-22 02:32:01,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 314. [2021-05-22 02:32:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:01,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-05-22 02:32:01,326 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-05-22 02:32:01,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:01,326 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-05-22 02:32:01,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:01,326 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-05-22 02:32:01,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:01,326 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:01,326 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:01,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5053 [2021-05-22 02:32:01,527 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:01,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:01,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1183189023, now seen corresponding path program 608 times [2021-05-22 02:32:01,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:01,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186320874] [2021-05-22 02:32:01,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:01,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:01,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186320874] [2021-05-22 02:32:01,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186320874] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:01,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644750333] [2021-05-22 02:32:01,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:01,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:32:01,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:01,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:01,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:02,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644750333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:02,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:02,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:02,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227912570] [2021-05-22 02:32:02,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:02,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:02,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:02,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:02,086 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:03,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:03,021 INFO L93 Difference]: Finished difference Result 398 states and 841 transitions. [2021-05-22 02:32:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:32:03,021 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:03,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:03,022 INFO L225 Difference]: With dead ends: 398 [2021-05-22 02:32:03,022 INFO L226 Difference]: Without dead ends: 376 [2021-05-22 02:32:03,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1113.2ms TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:32:03,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-05-22 02:32:03,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 314. [2021-05-22 02:32:03,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:03,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-05-22 02:32:03,024 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-05-22 02:32:03,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:03,025 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-05-22 02:32:03,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:03,025 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-05-22 02:32:03,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:03,025 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:03,025 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:03,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5063 [2021-05-22 02:32:03,225 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:03,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:03,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1689535289, now seen corresponding path program 609 times [2021-05-22 02:32:03,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:03,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287616047] [2021-05-22 02:32:03,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:03,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:03,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287616047] [2021-05-22 02:32:03,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287616047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:03,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206380965] [2021-05-22 02:32:03,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:03,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:32:03,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:03,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-22 02:32:03,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:03,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206380965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:03,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:03,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:03,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365200856] [2021-05-22 02:32:03,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:03,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:03,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:03,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:03,828 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:04,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:04,480 INFO L93 Difference]: Finished difference Result 382 states and 826 transitions. [2021-05-22 02:32:04,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:32:04,480 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:04,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:04,481 INFO L225 Difference]: With dead ends: 382 [2021-05-22 02:32:04,481 INFO L226 Difference]: Without dead ends: 363 [2021-05-22 02:32:04,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 805.2ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:32:04,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-22 02:32:04,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 314. [2021-05-22 02:32:04,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-05-22 02:32:04,483 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-05-22 02:32:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:04,483 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-05-22 02:32:04,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-05-22 02:32:04,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:04,484 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:04,484 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:04,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5075,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:04,684 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:04,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:04,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1230116495, now seen corresponding path program 610 times [2021-05-22 02:32:04,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:04,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377248369] [2021-05-22 02:32:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:04,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:04,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377248369] [2021-05-22 02:32:04,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377248369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:04,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278437099] [2021-05-22 02:32:04,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:04,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:32:04,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:04,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:32:04,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:05,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278437099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:05,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:05,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:05,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282747400] [2021-05-22 02:32:05,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:05,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:05,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:05,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:05,373 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:05,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:05,719 INFO L93 Difference]: Finished difference Result 330 states and 727 transitions. [2021-05-22 02:32:05,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:32:05,719 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:05,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:05,719 INFO L225 Difference]: With dead ends: 330 [2021-05-22 02:32:05,719 INFO L226 Difference]: Without dead ends: 315 [2021-05-22 02:32:05,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 752.7ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:32:05,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-22 02:32:05,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-05-22 02:32:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.248407643312102) internal successors, (706), 314 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 706 transitions. [2021-05-22 02:32:05,722 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 706 transitions. Word has length 20 [2021-05-22 02:32:05,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:05,722 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 706 transitions. [2021-05-22 02:32:05,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 706 transitions. [2021-05-22 02:32:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:05,722 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:05,722 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:05,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5088 [2021-05-22 02:32:05,923 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:05,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:05,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1411897427, now seen corresponding path program 611 times [2021-05-22 02:32:05,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:05,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605964255] [2021-05-22 02:32:05,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:06,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:06,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605964255] [2021-05-22 02:32:06,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605964255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:06,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483453911] [2021-05-22 02:32:06,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:06,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:32:06,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:06,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:32:06,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:06,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483453911] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:06,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:06,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:06,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193548794] [2021-05-22 02:32:06,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:06,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:06,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:06,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:06,624 INFO L87 Difference]: Start difference. First operand 315 states and 706 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:06,944 INFO L93 Difference]: Finished difference Result 329 states and 726 transitions. [2021-05-22 02:32:06,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:32:06,944 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:06,945 INFO L225 Difference]: With dead ends: 329 [2021-05-22 02:32:06,945 INFO L226 Difference]: Without dead ends: 316 [2021-05-22 02:32:06,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 737.3ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:32:06,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-22 02:32:06,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-05-22 02:32:06,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.2476190476190476) internal successors, (708), 315 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:06,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 708 transitions. [2021-05-22 02:32:06,947 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 708 transitions. Word has length 20 [2021-05-22 02:32:06,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:06,947 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 708 transitions. [2021-05-22 02:32:06,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:06,947 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 708 transitions. [2021-05-22 02:32:06,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:06,947 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:06,947 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:07,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5100 [2021-05-22 02:32:07,148 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:07,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:07,148 INFO L82 PathProgramCache]: Analyzing trace with hash -165444303, now seen corresponding path program 612 times [2021-05-22 02:32:07,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:07,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174458545] [2021-05-22 02:32:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:07,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:07,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174458545] [2021-05-22 02:32:07,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174458545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:07,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527922882] [2021-05-22 02:32:07,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:07,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:32:07,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:07,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:07,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:07,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527922882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:07,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:07,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:07,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134843323] [2021-05-22 02:32:07,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:07,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:07,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:07,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:07,916 INFO L87 Difference]: Start difference. First operand 316 states and 708 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:08,589 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-05-22 02:32:08,803 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-05-22 02:32:08,949 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2021-05-22 02:32:09,191 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2021-05-22 02:32:09,456 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-05-22 02:32:09,599 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-05-22 02:32:09,719 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-05-22 02:32:09,915 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2021-05-22 02:32:10,116 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-05-22 02:32:10,301 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-05-22 02:32:10,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:10,343 INFO L93 Difference]: Finished difference Result 404 states and 851 transitions. [2021-05-22 02:32:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-22 02:32:10,343 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:10,343 INFO L225 Difference]: With dead ends: 404 [2021-05-22 02:32:10,343 INFO L226 Difference]: Without dead ends: 379 [2021-05-22 02:32:10,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 2694.7ms TimeCoverageRelationStatistics Valid=298, Invalid=1864, Unknown=0, NotChecked=0, Total=2162 [2021-05-22 02:32:10,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-22 02:32:10,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 314. [2021-05-22 02:32:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:10,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-05-22 02:32:10,346 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 20 [2021-05-22 02:32:10,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:10,346 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-05-22 02:32:10,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:10,346 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-05-22 02:32:10,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:10,346 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:10,346 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:10,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5112 [2021-05-22 02:32:10,547 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:10,547 INFO L82 PathProgramCache]: Analyzing trace with hash -71237511, now seen corresponding path program 613 times [2021-05-22 02:32:10,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:10,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640196902] [2021-05-22 02:32:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:10,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:10,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640196902] [2021-05-22 02:32:10,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640196902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:10,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305255526] [2021-05-22 02:32:10,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:10,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:10,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:11,090 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-22 02:32:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:11,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305255526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:11,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:11,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:11,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966982169] [2021-05-22 02:32:11,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:11,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:11,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:11,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:11,259 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:11,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:11,639 INFO L93 Difference]: Finished difference Result 330 states and 728 transitions. [2021-05-22 02:32:11,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:32:11,639 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:11,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:11,640 INFO L225 Difference]: With dead ends: 330 [2021-05-22 02:32:11,640 INFO L226 Difference]: Without dead ends: 317 [2021-05-22 02:32:11,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 808.1ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:32:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-22 02:32:11,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 316. [2021-05-22 02:32:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.2476190476190476) internal successors, (708), 315 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 708 transitions. [2021-05-22 02:32:11,642 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 708 transitions. Word has length 20 [2021-05-22 02:32:11,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:11,642 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 708 transitions. [2021-05-22 02:32:11,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:11,642 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 708 transitions. [2021-05-22 02:32:11,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:11,643 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:11,643 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:11,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5124,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:11,843 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:11,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:11,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1648579241, now seen corresponding path program 614 times [2021-05-22 02:32:11,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:11,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582622816] [2021-05-22 02:32:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:12,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:12,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582622816] [2021-05-22 02:32:12,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582622816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:12,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004068288] [2021-05-22 02:32:12,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:12,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:32:12,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:12,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:12,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:12,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004068288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:12,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:12,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:12,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296083674] [2021-05-22 02:32:12,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:12,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:12,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:12,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:12,534 INFO L87 Difference]: Start difference. First operand 316 states and 708 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:13,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:13,625 INFO L93 Difference]: Finished difference Result 381 states and 826 transitions. [2021-05-22 02:32:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:32:13,625 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:13,625 INFO L225 Difference]: With dead ends: 381 [2021-05-22 02:32:13,625 INFO L226 Difference]: Without dead ends: 357 [2021-05-22 02:32:13,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1404.0ms TimeCoverageRelationStatistics Valid=203, Invalid=1279, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:32:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-05-22 02:32:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 318. [2021-05-22 02:32:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.2523659305993693) internal successors, (714), 317 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:13,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 714 transitions. [2021-05-22 02:32:13,628 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 714 transitions. Word has length 20 [2021-05-22 02:32:13,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:13,628 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 714 transitions. [2021-05-22 02:32:13,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 714 transitions. [2021-05-22 02:32:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:13,629 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:13,629 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:13,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5135 [2021-05-22 02:32:13,829 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash -313987911, now seen corresponding path program 615 times [2021-05-22 02:32:13,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:13,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865730824] [2021-05-22 02:32:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:14,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:14,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865730824] [2021-05-22 02:32:14,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865730824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:14,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496832793] [2021-05-22 02:32:14,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:14,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:32:14,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:14,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:32:14,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:14,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496832793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:14,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:14,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:14,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528942896] [2021-05-22 02:32:14,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:14,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:14,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:14,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:14,451 INFO L87 Difference]: Start difference. First operand 318 states and 714 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:15,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:15,755 INFO L93 Difference]: Finished difference Result 384 states and 823 transitions. [2021-05-22 02:32:15,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:32:15,755 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:15,756 INFO L225 Difference]: With dead ends: 384 [2021-05-22 02:32:15,756 INFO L226 Difference]: Without dead ends: 352 [2021-05-22 02:32:15,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1501.8ms TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:32:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-05-22 02:32:15,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 322. [2021-05-22 02:32:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.2585669781931466) internal successors, (725), 321 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:15,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 725 transitions. [2021-05-22 02:32:15,759 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 725 transitions. Word has length 20 [2021-05-22 02:32:15,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:15,759 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 725 transitions. [2021-05-22 02:32:15,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:15,759 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 725 transitions. [2021-05-22 02:32:15,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:15,759 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:15,759 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:15,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5147,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:15,959 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:15,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:15,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1142232975, now seen corresponding path program 616 times [2021-05-22 02:32:15,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:15,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405392836] [2021-05-22 02:32:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:16,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:16,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405392836] [2021-05-22 02:32:16,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405392836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:16,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062215926] [2021-05-22 02:32:16,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:16,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:32:16,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:32:16,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:16,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062215926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:16,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:16,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:16,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293741757] [2021-05-22 02:32:16,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:16,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:16,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:16,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:16,596 INFO L87 Difference]: Start difference. First operand 322 states and 725 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:17,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:17,380 INFO L93 Difference]: Finished difference Result 376 states and 818 transitions. [2021-05-22 02:32:17,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:32:17,380 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:17,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:17,381 INFO L225 Difference]: With dead ends: 376 [2021-05-22 02:32:17,381 INFO L226 Difference]: Without dead ends: 351 [2021-05-22 02:32:17,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1071.6ms TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:32:17,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-22 02:32:17,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 323. [2021-05-22 02:32:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.2577639751552794) internal successors, (727), 322 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 727 transitions. [2021-05-22 02:32:17,383 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 727 transitions. Word has length 20 [2021-05-22 02:32:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:17,383 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 727 transitions. [2021-05-22 02:32:17,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 727 transitions. [2021-05-22 02:32:17,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:17,384 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:17,384 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:17,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5159,617 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:17,584 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:17,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:17,584 INFO L82 PathProgramCache]: Analyzing trace with hash -345497223, now seen corresponding path program 617 times [2021-05-22 02:32:17,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:17,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347929220] [2021-05-22 02:32:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:17,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:17,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347929220] [2021-05-22 02:32:17,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347929220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:17,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725539441] [2021-05-22 02:32:17,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:17,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:32:17,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:17,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:32:17,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:18,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725539441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:18,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:18,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:18,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372700487] [2021-05-22 02:32:18,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:18,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:18,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:18,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:18,131 INFO L87 Difference]: Start difference. First operand 323 states and 727 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:18,955 INFO L93 Difference]: Finished difference Result 393 states and 843 transitions. [2021-05-22 02:32:18,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:32:18,955 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:18,955 INFO L225 Difference]: With dead ends: 393 [2021-05-22 02:32:18,955 INFO L226 Difference]: Without dead ends: 371 [2021-05-22 02:32:18,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 943.1ms TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:32:18,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-05-22 02:32:18,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 322. [2021-05-22 02:32:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.2585669781931466) internal successors, (725), 321 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:18,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 725 transitions. [2021-05-22 02:32:18,958 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 725 transitions. Word has length 20 [2021-05-22 02:32:18,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:18,958 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 725 transitions. [2021-05-22 02:32:18,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:18,958 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 725 transitions. [2021-05-22 02:32:18,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:18,959 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:18,959 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:19,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5171,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:19,159 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:19,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:19,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1196219667, now seen corresponding path program 618 times [2021-05-22 02:32:19,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:19,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910493978] [2021-05-22 02:32:19,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:19,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:19,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910493978] [2021-05-22 02:32:19,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910493978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:19,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617816819] [2021-05-22 02:32:19,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:19,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:32:19,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:19,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:19,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:19,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617816819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:19,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:19,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:19,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711878891] [2021-05-22 02:32:19,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:19,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:19,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:19,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:19,819 INFO L87 Difference]: Start difference. First operand 322 states and 725 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:20,119 INFO L93 Difference]: Finished difference Result 338 states and 749 transitions. [2021-05-22 02:32:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:32:20,120 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:20,120 INFO L225 Difference]: With dead ends: 338 [2021-05-22 02:32:20,120 INFO L226 Difference]: Without dead ends: 325 [2021-05-22 02:32:20,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 681.3ms TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:32:20,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-22 02:32:20,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-05-22 02:32:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.256172839506173) internal successors, (731), 324 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:20,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 731 transitions. [2021-05-22 02:32:20,123 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 731 transitions. Word has length 20 [2021-05-22 02:32:20,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:20,123 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 731 transitions. [2021-05-22 02:32:20,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 731 transitions. [2021-05-22 02:32:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:20,123 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:20,123 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:20,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5183 [2021-05-22 02:32:20,324 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:20,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:20,324 INFO L82 PathProgramCache]: Analyzing trace with hash -381122063, now seen corresponding path program 619 times [2021-05-22 02:32:20,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:20,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737220164] [2021-05-22 02:32:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:20,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:20,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737220164] [2021-05-22 02:32:20,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737220164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:20,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154384890] [2021-05-22 02:32:20,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:20,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:32:20,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:21,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154384890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:21,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:21,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:21,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679853938] [2021-05-22 02:32:21,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:21,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:21,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:21,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:21,011 INFO L87 Difference]: Start difference. First operand 325 states and 731 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:22,275 INFO L93 Difference]: Finished difference Result 415 states and 880 transitions. [2021-05-22 02:32:22,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:32:22,275 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:22,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:22,276 INFO L225 Difference]: With dead ends: 415 [2021-05-22 02:32:22,276 INFO L226 Difference]: Without dead ends: 390 [2021-05-22 02:32:22,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1546.3ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:32:22,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-22 02:32:22,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 325. [2021-05-22 02:32:22,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.256172839506173) internal successors, (731), 324 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:22,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 731 transitions. [2021-05-22 02:32:22,278 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 731 transitions. Word has length 20 [2021-05-22 02:32:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:22,279 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 731 transitions. [2021-05-22 02:32:22,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:22,279 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 731 transitions. [2021-05-22 02:32:22,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:22,279 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:22,279 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:22,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5195,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:22,479 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:22,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:22,479 INFO L82 PathProgramCache]: Analyzing trace with hash 125224203, now seen corresponding path program 620 times [2021-05-22 02:32:22,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:22,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067858249] [2021-05-22 02:32:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:22,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:22,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067858249] [2021-05-22 02:32:22,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067858249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:22,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873001006] [2021-05-22 02:32:22,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:22,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:32:22,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:22,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:22,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:23,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873001006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:23,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:23,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:23,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211049589] [2021-05-22 02:32:23,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:23,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:23,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:23,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:23,116 INFO L87 Difference]: Start difference. First operand 325 states and 731 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:23,877 INFO L93 Difference]: Finished difference Result 378 states and 811 transitions. [2021-05-22 02:32:23,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:32:23,877 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:23,878 INFO L225 Difference]: With dead ends: 378 [2021-05-22 02:32:23,878 INFO L226 Difference]: Without dead ends: 346 [2021-05-22 02:32:23,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1032.8ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:32:23,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-22 02:32:23,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 326. [2021-05-22 02:32:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.2553846153846155) internal successors, (733), 325 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 733 transitions. [2021-05-22 02:32:23,881 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 733 transitions. Word has length 20 [2021-05-22 02:32:23,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:23,881 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 733 transitions. [2021-05-22 02:32:23,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:23,881 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 733 transitions. [2021-05-22 02:32:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:23,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:23,881 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:24,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5207,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:24,081 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:24,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:24,082 INFO L82 PathProgramCache]: Analyzing trace with hash 921959955, now seen corresponding path program 621 times [2021-05-22 02:32:24,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:24,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082920474] [2021-05-22 02:32:24,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:24,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:24,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082920474] [2021-05-22 02:32:24,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082920474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:24,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084793493] [2021-05-22 02:32:24,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:24,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:32:24,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:24,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-22 02:32:24,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:24,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084793493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:24,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:24,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:24,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541838544] [2021-05-22 02:32:24,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:24,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:24,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:24,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:24,643 INFO L87 Difference]: Start difference. First operand 326 states and 733 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:25,604 INFO L93 Difference]: Finished difference Result 414 states and 889 transitions. [2021-05-22 02:32:25,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:32:25,604 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:25,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:25,604 INFO L225 Difference]: With dead ends: 414 [2021-05-22 02:32:25,604 INFO L226 Difference]: Without dead ends: 400 [2021-05-22 02:32:25,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1085.9ms TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:32:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-22 02:32:25,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 328. [2021-05-22 02:32:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.2629969418960245) internal successors, (740), 327 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:25,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 740 transitions. [2021-05-22 02:32:25,607 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 740 transitions. Word has length 20 [2021-05-22 02:32:25,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:25,608 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 740 transitions. [2021-05-22 02:32:25,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:25,608 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 740 transitions. [2021-05-22 02:32:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:25,608 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:25,608 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:25,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5219,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:25,808 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:25,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:25,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1357910735, now seen corresponding path program 622 times [2021-05-22 02:32:25,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:25,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890114209] [2021-05-22 02:32:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:26,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:26,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890114209] [2021-05-22 02:32:26,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890114209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:26,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735938672] [2021-05-22 02:32:26,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:26,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:32:26,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:26,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:32:26,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:26,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735938672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:26,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:26,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:26,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029009401] [2021-05-22 02:32:26,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:26,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:26,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:26,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:26,470 INFO L87 Difference]: Start difference. First operand 328 states and 740 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:27,513 INFO L93 Difference]: Finished difference Result 380 states and 831 transitions. [2021-05-22 02:32:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:32:27,513 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:27,514 INFO L225 Difference]: With dead ends: 380 [2021-05-22 02:32:27,514 INFO L226 Difference]: Without dead ends: 359 [2021-05-22 02:32:27,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1273.1ms TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:32:27,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-22 02:32:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 330. [2021-05-22 02:32:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-05-22 02:32:27,517 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-05-22 02:32:27,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:27,517 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-05-22 02:32:27,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:27,517 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-05-22 02:32:27,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:27,520 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:27,520 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:27,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5231 [2021-05-22 02:32:27,733 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:27,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:27,733 INFO L82 PathProgramCache]: Analyzing trace with hash -561174983, now seen corresponding path program 623 times [2021-05-22 02:32:27,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:27,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441895870] [2021-05-22 02:32:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:27,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:27,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441895870] [2021-05-22 02:32:27,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441895870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:27,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351468967] [2021-05-22 02:32:27,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:27,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:32:27,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:27,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:27,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:28,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351468967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:28,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:28,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:28,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463233782] [2021-05-22 02:32:28,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:28,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:28,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:28,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:28,432 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:29,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:29,761 INFO L93 Difference]: Finished difference Result 412 states and 877 transitions. [2021-05-22 02:32:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:32:29,761 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:29,762 INFO L225 Difference]: With dead ends: 412 [2021-05-22 02:32:29,762 INFO L226 Difference]: Without dead ends: 390 [2021-05-22 02:32:29,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1513.1ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:32:29,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-22 02:32:29,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 330. [2021-05-22 02:32:29,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-05-22 02:32:29,765 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-05-22 02:32:29,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:29,765 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-05-22 02:32:29,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:29,765 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-05-22 02:32:29,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:29,765 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:29,765 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:29,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5246,624 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:29,973 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:29,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:29,973 INFO L82 PathProgramCache]: Analyzing trace with hash -54828717, now seen corresponding path program 624 times [2021-05-22 02:32:29,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:29,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922598244] [2021-05-22 02:32:29,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:30,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:30,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922598244] [2021-05-22 02:32:30,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922598244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:30,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914924233] [2021-05-22 02:32:30,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:30,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:32:30,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:30,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-22 02:32:30,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:30,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914924233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:30,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:30,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:30,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311762073] [2021-05-22 02:32:30,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:30,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:30,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:30,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:30,614 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:31,280 INFO L93 Difference]: Finished difference Result 397 states and 864 transitions. [2021-05-22 02:32:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:32:31,281 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:31,281 INFO L225 Difference]: With dead ends: 397 [2021-05-22 02:32:31,281 INFO L226 Difference]: Without dead ends: 378 [2021-05-22 02:32:31,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 806.2ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:32:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-22 02:32:31,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 330. [2021-05-22 02:32:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:31,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-05-22 02:32:31,284 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-05-22 02:32:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:31,284 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-05-22 02:32:31,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:31,284 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-05-22 02:32:31,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:31,284 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:31,284 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:31,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5259,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:31,485 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:31,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:31,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1832686521, now seen corresponding path program 625 times [2021-05-22 02:32:31,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:31,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724067636] [2021-05-22 02:32:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:31,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:31,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724067636] [2021-05-22 02:32:31,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724067636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:31,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962367907] [2021-05-22 02:32:31,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:31,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:31,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:31,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:32,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962367907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:32,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:32,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:32,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447108826] [2021-05-22 02:32:32,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:32,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:32,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:32,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:32,273 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:32,821 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-05-22 02:32:33,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:33,007 INFO L93 Difference]: Finished difference Result 355 states and 781 transitions. [2021-05-22 02:32:33,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:32:33,008 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:33,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:33,008 INFO L225 Difference]: With dead ends: 355 [2021-05-22 02:32:33,008 INFO L226 Difference]: Without dead ends: 348 [2021-05-22 02:32:33,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1091.5ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:32:33,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-22 02:32:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 331. [2021-05-22 02:32:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.2636363636363637) internal successors, (747), 330 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 747 transitions. [2021-05-22 02:32:33,011 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 747 transitions. Word has length 20 [2021-05-22 02:32:33,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:33,011 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 747 transitions. [2021-05-22 02:32:33,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 747 transitions. [2021-05-22 02:32:33,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:33,011 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:33,011 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:33,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5271 [2021-05-22 02:32:33,212 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:33,212 INFO L82 PathProgramCache]: Analyzing trace with hash 255344791, now seen corresponding path program 626 times [2021-05-22 02:32:33,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:33,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100200622] [2021-05-22 02:32:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:33,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:33,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100200622] [2021-05-22 02:32:33,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100200622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:33,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663065163] [2021-05-22 02:32:33,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:33,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:32:33,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:33,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:33,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:33,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663065163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:33,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:33,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:33,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101674542] [2021-05-22 02:32:33,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:33,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:33,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:33,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:33,943 INFO L87 Difference]: Start difference. First operand 331 states and 747 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:34,890 INFO L93 Difference]: Finished difference Result 382 states and 824 transitions. [2021-05-22 02:32:34,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:32:34,891 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:34,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:34,891 INFO L225 Difference]: With dead ends: 382 [2021-05-22 02:32:34,891 INFO L226 Difference]: Without dead ends: 351 [2021-05-22 02:32:34,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1257.5ms TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:32:34,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-22 02:32:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 330. [2021-05-22 02:32:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:34,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-05-22 02:32:34,894 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-05-22 02:32:34,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:34,894 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-05-22 02:32:34,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-05-22 02:32:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:34,894 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:34,894 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:35,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5285,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:35,095 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:35,095 INFO L82 PathProgramCache]: Analyzing trace with hash 761691057, now seen corresponding path program 627 times [2021-05-22 02:32:35,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:35,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425586050] [2021-05-22 02:32:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:35,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:35,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425586050] [2021-05-22 02:32:35,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425586050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:35,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321881887] [2021-05-22 02:32:35,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:35,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:32:35,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:35,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:32:35,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:35,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321881887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:35,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:35,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:35,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178453805] [2021-05-22 02:32:35,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:35,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:35,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:35,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:35,712 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:36,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:36,819 INFO L93 Difference]: Finished difference Result 392 states and 842 transitions. [2021-05-22 02:32:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:32:36,820 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:36,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:36,820 INFO L225 Difference]: With dead ends: 392 [2021-05-22 02:32:36,820 INFO L226 Difference]: Without dead ends: 371 [2021-05-22 02:32:36,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1342.3ms TimeCoverageRelationStatistics Valid=195, Invalid=1527, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:32:36,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-05-22 02:32:36,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 330. [2021-05-22 02:32:36,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2613981762917934) internal successors, (744), 329 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 744 transitions. [2021-05-22 02:32:36,823 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 744 transitions. Word has length 20 [2021-05-22 02:32:36,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:36,823 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 744 transitions. [2021-05-22 02:32:36,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 744 transitions. [2021-05-22 02:32:36,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:36,823 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:36,823 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:37,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5297 [2021-05-22 02:32:37,024 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:37,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:37,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1366393994, now seen corresponding path program 628 times [2021-05-22 02:32:37,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:37,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314067588] [2021-05-22 02:32:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:32:37,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:37,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314067588] [2021-05-22 02:32:37,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314067588] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:37,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654187874] [2021-05-22 02:32:37,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:37,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:32:37,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:37,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:32:37,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:32:37,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654187874] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:37,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:37,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:32:37,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046827251] [2021-05-22 02:32:37,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:32:37,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:37,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:32:37,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:32:37,368 INFO L87 Difference]: Start difference. First operand 330 states and 744 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:37,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:37,820 INFO L93 Difference]: Finished difference Result 383 states and 848 transitions. [2021-05-22 02:32:37,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:32:37,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:37,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:37,821 INFO L225 Difference]: With dead ends: 383 [2021-05-22 02:32:37,821 INFO L226 Difference]: Without dead ends: 381 [2021-05-22 02:32:37,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 563.3ms TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:32:37,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-22 02:32:37,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 330. [2021-05-22 02:32:37,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2583586626139818) internal successors, (743), 329 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 743 transitions. [2021-05-22 02:32:37,823 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 743 transitions. Word has length 20 [2021-05-22 02:32:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:37,823 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 743 transitions. [2021-05-22 02:32:37,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 743 transitions. [2021-05-22 02:32:37,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:37,824 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:37,824 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:38,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5312,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:38,024 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:38,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:38,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1558426809, now seen corresponding path program 629 times [2021-05-22 02:32:38,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:38,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184208594] [2021-05-22 02:32:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:38,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:38,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184208594] [2021-05-22 02:32:38,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184208594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:38,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98330439] [2021-05-22 02:32:38,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:38,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:32:38,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:38,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:38,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:38,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98330439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:38,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:38,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:38,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500760925] [2021-05-22 02:32:38,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:38,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:38,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:38,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:38,601 INFO L87 Difference]: Start difference. First operand 330 states and 743 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:39,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:39,571 INFO L93 Difference]: Finished difference Result 412 states and 885 transitions. [2021-05-22 02:32:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:32:39,571 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:39,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:39,571 INFO L225 Difference]: With dead ends: 412 [2021-05-22 02:32:39,571 INFO L226 Difference]: Without dead ends: 393 [2021-05-22 02:32:39,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1142.6ms TimeCoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:32:39,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-22 02:32:39,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 335. [2021-05-22 02:32:39,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.2574850299401197) internal successors, (754), 334 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 754 transitions. [2021-05-22 02:32:39,574 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 754 transitions. Word has length 20 [2021-05-22 02:32:39,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:39,574 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 754 transitions. [2021-05-22 02:32:39,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:39,574 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 754 transitions. [2021-05-22 02:32:39,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:39,575 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:39,575 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:39,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 630 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5321 [2021-05-22 02:32:39,775 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:39,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:39,775 INFO L82 PathProgramCache]: Analyzing trace with hash -721443881, now seen corresponding path program 630 times [2021-05-22 02:32:39,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:39,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247143931] [2021-05-22 02:32:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:39,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:39,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247143931] [2021-05-22 02:32:39,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247143931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:39,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433521682] [2021-05-22 02:32:39,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:40,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:32:40,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:40,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:40,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:40,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433521682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:40,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:40,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:40,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267317501] [2021-05-22 02:32:40,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:40,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:40,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:40,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:40,431 INFO L87 Difference]: Start difference. First operand 335 states and 754 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:41,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:41,119 INFO L93 Difference]: Finished difference Result 382 states and 828 transitions. [2021-05-22 02:32:41,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:32:41,120 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:41,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:41,120 INFO L225 Difference]: With dead ends: 382 [2021-05-22 02:32:41,120 INFO L226 Difference]: Without dead ends: 357 [2021-05-22 02:32:41,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 976.6ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:32:41,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-05-22 02:32:41,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 337. [2021-05-22 02:32:41,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.255952380952381) internal successors, (758), 336 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:41,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 758 transitions. [2021-05-22 02:32:41,123 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 758 transitions. Word has length 20 [2021-05-22 02:32:41,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:41,123 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 758 transitions. [2021-05-22 02:32:41,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:41,123 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 758 transitions. [2021-05-22 02:32:41,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:41,123 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:41,123 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:41,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5333 [2021-05-22 02:32:41,323 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:41,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:41,324 INFO L82 PathProgramCache]: Analyzing trace with hash 75291871, now seen corresponding path program 631 times [2021-05-22 02:32:41,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:41,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427858358] [2021-05-22 02:32:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:41,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:41,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:41,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427858358] [2021-05-22 02:32:41,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427858358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:41,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106220375] [2021-05-22 02:32:41,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:41,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:41,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:41,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106220375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:41,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:41,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:41,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842122286] [2021-05-22 02:32:41,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:41,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:41,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:41,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:41,867 INFO L87 Difference]: Start difference. First operand 337 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:42,522 INFO L93 Difference]: Finished difference Result 397 states and 864 transitions. [2021-05-22 02:32:42,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:32:42,522 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:42,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:42,522 INFO L225 Difference]: With dead ends: 397 [2021-05-22 02:32:42,523 INFO L226 Difference]: Without dead ends: 378 [2021-05-22 02:32:42,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 799.5ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:32:42,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-22 02:32:42,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 337. [2021-05-22 02:32:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.255952380952381) internal successors, (758), 336 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 758 transitions. [2021-05-22 02:32:42,525 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 758 transitions. Word has length 20 [2021-05-22 02:32:42,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:42,525 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 758 transitions. [2021-05-22 02:32:42,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:42,525 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 758 transitions. [2021-05-22 02:32:42,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:42,526 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:42,526 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:42,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5345,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:42,726 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:42,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:42,726 INFO L82 PathProgramCache]: Analyzing trace with hash 581638137, now seen corresponding path program 632 times [2021-05-22 02:32:42,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:42,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801064455] [2021-05-22 02:32:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:42,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:42,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:42,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801064455] [2021-05-22 02:32:42,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801064455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:42,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805372596] [2021-05-22 02:32:42,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:42,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:32:42,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:42,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:42,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:43,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805372596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:43,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:43,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:43,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836397581] [2021-05-22 02:32:43,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:43,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:43,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:43,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:43,333 INFO L87 Difference]: Start difference. First operand 337 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:43,738 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-05-22 02:32:43,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:43,955 INFO L93 Difference]: Finished difference Result 404 states and 878 transitions. [2021-05-22 02:32:43,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:32:43,956 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:43,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:43,956 INFO L225 Difference]: With dead ends: 404 [2021-05-22 02:32:43,956 INFO L226 Difference]: Without dead ends: 385 [2021-05-22 02:32:43,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 863.4ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:32:43,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-05-22 02:32:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 337. [2021-05-22 02:32:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.255952380952381) internal successors, (758), 336 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 758 transitions. [2021-05-22 02:32:43,959 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 758 transitions. Word has length 20 [2021-05-22 02:32:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:43,959 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 758 transitions. [2021-05-22 02:32:43,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 758 transitions. [2021-05-22 02:32:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:43,959 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:43,959 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:44,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5357,633 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:44,160 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:44,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:44,160 INFO L82 PathProgramCache]: Analyzing trace with hash 546013297, now seen corresponding path program 633 times [2021-05-22 02:32:44,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:44,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437024237] [2021-05-22 02:32:44,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:44,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:44,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437024237] [2021-05-22 02:32:44,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437024237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:44,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62252897] [2021-05-22 02:32:44,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:44,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:32:44,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:44,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-22 02:32:44,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:44,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62252897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:44,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:44,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:44,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584952714] [2021-05-22 02:32:44,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:44,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:44,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:44,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:44,705 INFO L87 Difference]: Start difference. First operand 337 states and 758 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:45,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:45,435 INFO L93 Difference]: Finished difference Result 391 states and 851 transitions. [2021-05-22 02:32:45,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:32:45,435 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:45,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:45,435 INFO L225 Difference]: With dead ends: 391 [2021-05-22 02:32:45,435 INFO L226 Difference]: Without dead ends: 366 [2021-05-22 02:32:45,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 944.1ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:32:45,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-05-22 02:32:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 340. [2021-05-22 02:32:45,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.253687315634218) internal successors, (764), 339 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 764 transitions. [2021-05-22 02:32:45,438 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 764 transitions. Word has length 20 [2021-05-22 02:32:45,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:45,438 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 764 transitions. [2021-05-22 02:32:45,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:45,438 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 764 transitions. [2021-05-22 02:32:45,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:45,438 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:45,439 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:45,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5369,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:45,647 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:45,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1342749049, now seen corresponding path program 634 times [2021-05-22 02:32:45,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:45,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176284342] [2021-05-22 02:32:45,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:45,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:45,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176284342] [2021-05-22 02:32:45,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176284342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:45,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630296706] [2021-05-22 02:32:45,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:45,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:32:45,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:45,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:45,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:46,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630296706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:46,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:46,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:46,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296161568] [2021-05-22 02:32:46,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:46,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:46,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:46,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:46,210 INFO L87 Difference]: Start difference. First operand 340 states and 764 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:46,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:46,793 INFO L93 Difference]: Finished difference Result 400 states and 870 transitions. [2021-05-22 02:32:46,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:32:46,794 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:46,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:46,794 INFO L225 Difference]: With dead ends: 400 [2021-05-22 02:32:46,794 INFO L226 Difference]: Without dead ends: 381 [2021-05-22 02:32:46,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 762.8ms TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:32:46,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-22 02:32:46,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 339. [2021-05-22 02:32:46,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.2544378698224854) internal successors, (762), 338 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:46,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 762 transitions. [2021-05-22 02:32:46,797 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 762 transitions. Word has length 20 [2021-05-22 02:32:46,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:46,797 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 762 transitions. [2021-05-22 02:32:46,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:46,797 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 762 transitions. [2021-05-22 02:32:46,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:46,798 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:46,798 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:46,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5383,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:46,998 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:46,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1849095315, now seen corresponding path program 635 times [2021-05-22 02:32:46,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:46,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795341973] [2021-05-22 02:32:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:47,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:47,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795341973] [2021-05-22 02:32:47,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795341973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:47,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504762785] [2021-05-22 02:32:47,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:47,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:32:47,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:47,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:47,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:47,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504762785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:47,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:47,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:47,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606690677] [2021-05-22 02:32:47,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:47,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:47,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:47,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:47,596 INFO L87 Difference]: Start difference. First operand 339 states and 762 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:48,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:48,281 INFO L93 Difference]: Finished difference Result 404 states and 878 transitions. [2021-05-22 02:32:48,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:32:48,281 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:48,281 INFO L225 Difference]: With dead ends: 404 [2021-05-22 02:32:48,281 INFO L226 Difference]: Without dead ends: 385 [2021-05-22 02:32:48,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 833.9ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:32:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-05-22 02:32:48,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 338. [2021-05-22 02:32:48,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.255192878338279) internal successors, (760), 337 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:48,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 760 transitions. [2021-05-22 02:32:48,284 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 760 transitions. Word has length 20 [2021-05-22 02:32:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:48,284 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 760 transitions. [2021-05-22 02:32:48,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 760 transitions. [2021-05-22 02:32:48,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:48,285 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:48,285 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:48,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5395 [2021-05-22 02:32:48,485 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:48,486 INFO L82 PathProgramCache]: Analyzing trace with hash 365960377, now seen corresponding path program 636 times [2021-05-22 02:32:48,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:48,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322572762] [2021-05-22 02:32:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:48,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:48,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322572762] [2021-05-22 02:32:48,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322572762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:48,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776969494] [2021-05-22 02:32:48,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:48,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:32:48,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:48,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-22 02:32:48,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:49,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776969494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:49,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:49,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:49,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824863573] [2021-05-22 02:32:49,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:49,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:49,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:49,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:49,127 INFO L87 Difference]: Start difference. First operand 338 states and 760 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:49,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:49,684 INFO L93 Difference]: Finished difference Result 408 states and 886 transitions. [2021-05-22 02:32:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:32:49,685 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:49,685 INFO L225 Difference]: With dead ends: 408 [2021-05-22 02:32:49,685 INFO L226 Difference]: Without dead ends: 389 [2021-05-22 02:32:49,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 770.2ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:32:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-22 02:32:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 339. [2021-05-22 02:32:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.257396449704142) internal successors, (763), 338 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 763 transitions. [2021-05-22 02:32:49,688 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 763 transitions. Word has length 20 [2021-05-22 02:32:49,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:49,688 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 763 transitions. [2021-05-22 02:32:49,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:49,688 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 763 transitions. [2021-05-22 02:32:49,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:49,688 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:49,688 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:49,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5407,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:49,889 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:49,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:49,889 INFO L82 PathProgramCache]: Analyzing trace with hash 529174167, now seen corresponding path program 637 times [2021-05-22 02:32:49,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:49,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482554563] [2021-05-22 02:32:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:50,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:50,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482554563] [2021-05-22 02:32:50,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482554563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:50,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002460771] [2021-05-22 02:32:50,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:50,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:32:50,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:50,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002460771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:50,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:50,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:50,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833043381] [2021-05-22 02:32:50,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:50,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:50,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:50,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:50,682 INFO L87 Difference]: Start difference. First operand 339 states and 763 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:51,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:51,046 INFO L93 Difference]: Finished difference Result 360 states and 795 transitions. [2021-05-22 02:32:51,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:32:51,047 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:51,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:51,047 INFO L225 Difference]: With dead ends: 360 [2021-05-22 02:32:51,047 INFO L226 Difference]: Without dead ends: 345 [2021-05-22 02:32:51,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 864.0ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-05-22 02:32:51,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-22 02:32:51,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2021-05-22 02:32:51,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.2551319648093844) internal successors, (769), 341 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 769 transitions. [2021-05-22 02:32:51,050 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 769 transitions. Word has length 20 [2021-05-22 02:32:51,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:51,050 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 769 transitions. [2021-05-22 02:32:51,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:51,050 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 769 transitions. [2021-05-22 02:32:51,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:51,050 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:51,050 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:51,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5419 [2021-05-22 02:32:51,251 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:51,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:51,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1123779207, now seen corresponding path program 638 times [2021-05-22 02:32:51,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:51,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195828276] [2021-05-22 02:32:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:51,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:51,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:51,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195828276] [2021-05-22 02:32:51,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195828276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:51,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221255817] [2021-05-22 02:32:51,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:51,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:32:51,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:51,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:32:51,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:51,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221255817] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:51,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:51,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:51,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119607116] [2021-05-22 02:32:51,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:51,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:51,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:51,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:51,929 INFO L87 Difference]: Start difference. First operand 342 states and 769 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:52,554 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2021-05-22 02:32:52,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:52,814 INFO L93 Difference]: Finished difference Result 370 states and 811 transitions. [2021-05-22 02:32:52,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:32:52,815 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:52,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:52,815 INFO L225 Difference]: With dead ends: 370 [2021-05-22 02:32:52,815 INFO L226 Difference]: Without dead ends: 363 [2021-05-22 02:32:52,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1124.0ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:32:52,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-05-22 02:32:52,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 343. [2021-05-22 02:32:52,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.257309941520468) internal successors, (772), 342 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:52,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 772 transitions. [2021-05-22 02:32:52,818 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 772 transitions. Word has length 20 [2021-05-22 02:32:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:52,818 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 772 transitions. [2021-05-22 02:32:52,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 772 transitions. [2021-05-22 02:32:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:52,818 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:52,818 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:53,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5431,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:53,019 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:53,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:53,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1593846359, now seen corresponding path program 639 times [2021-05-22 02:32:53,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:53,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958594010] [2021-05-22 02:32:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:53,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:53,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958594010] [2021-05-22 02:32:53,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958594010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:53,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168064913] [2021-05-22 02:32:53,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:53,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:32:53,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:53,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:32:53,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:53,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168064913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:53,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:53,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:53,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518555738] [2021-05-22 02:32:53,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:53,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:53,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:53,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:53,723 INFO L87 Difference]: Start difference. First operand 343 states and 772 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:55,462 INFO L93 Difference]: Finished difference Result 447 states and 939 transitions. [2021-05-22 02:32:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:32:55,462 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:55,463 INFO L225 Difference]: With dead ends: 447 [2021-05-22 02:32:55,463 INFO L226 Difference]: Without dead ends: 409 [2021-05-22 02:32:55,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1910.8ms TimeCoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:32:55,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-22 02:32:55,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 342. [2021-05-22 02:32:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.2551319648093844) internal successors, (769), 341 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 769 transitions. [2021-05-22 02:32:55,465 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 769 transitions. Word has length 20 [2021-05-22 02:32:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:55,466 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 769 transitions. [2021-05-22 02:32:55,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 769 transitions. [2021-05-22 02:32:55,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:55,466 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:55,466 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:55,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5446 [2021-05-22 02:32:55,666 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:55,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:55,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1688053151, now seen corresponding path program 640 times [2021-05-22 02:32:55,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:55,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490729861] [2021-05-22 02:32:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:55,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:55,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490729861] [2021-05-22 02:32:55,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490729861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:55,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513365444] [2021-05-22 02:32:55,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:55,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:32:55,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:55,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:32:55,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:56,229 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-22 02:32:56,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:56,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513365444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:56,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:56,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:56,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057791959] [2021-05-22 02:32:56,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:56,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:56,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:56,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:56,398 INFO L87 Difference]: Start difference. First operand 342 states and 769 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:56,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:56,860 INFO L93 Difference]: Finished difference Result 361 states and 798 transitions. [2021-05-22 02:32:56,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-22 02:32:56,860 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:56,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:56,860 INFO L225 Difference]: With dead ends: 361 [2021-05-22 02:32:56,860 INFO L226 Difference]: Without dead ends: 348 [2021-05-22 02:32:56,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 864.4ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:32:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-22 02:32:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 344. [2021-05-22 02:32:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.253644314868805) internal successors, (773), 343 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 773 transitions. [2021-05-22 02:32:56,863 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 773 transitions. Word has length 20 [2021-05-22 02:32:56,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:56,863 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 773 transitions. [2021-05-22 02:32:56,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:56,863 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 773 transitions. [2021-05-22 02:32:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:56,864 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:56,864 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:57,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5461 [2021-05-22 02:32:57,064 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:57,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:57,064 INFO L82 PathProgramCache]: Analyzing trace with hash 110711421, now seen corresponding path program 641 times [2021-05-22 02:32:57,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:57,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512487807] [2021-05-22 02:32:57,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:32:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:57,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:32:57,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512487807] [2021-05-22 02:32:57,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512487807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:57,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840046041] [2021-05-22 02:32:57,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:57,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:32:57,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:32:57,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:32:57,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:32:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:32:57,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840046041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:32:57,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:32:57,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:32:57,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111148185] [2021-05-22 02:32:57,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:32:57,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:32:57,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:32:57,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:32:57,728 INFO L87 Difference]: Start difference. First operand 344 states and 773 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:58,733 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2021-05-22 02:32:58,867 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-05-22 02:32:59,003 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-05-22 02:32:59,220 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2021-05-22 02:32:59,741 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-05-22 02:32:59,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:32:59,757 INFO L93 Difference]: Finished difference Result 428 states and 906 transitions. [2021-05-22 02:32:59,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:32:59,758 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:32:59,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:32:59,758 INFO L225 Difference]: With dead ends: 428 [2021-05-22 02:32:59,758 INFO L226 Difference]: Without dead ends: 396 [2021-05-22 02:32:59,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2224.2ms TimeCoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2021-05-22 02:32:59,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-05-22 02:32:59,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 343. [2021-05-22 02:32:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.254385964912281) internal successors, (771), 342 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 771 transitions. [2021-05-22 02:32:59,761 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 771 transitions. Word has length 20 [2021-05-22 02:32:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:32:59,761 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 771 transitions. [2021-05-22 02:32:59,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:32:59,761 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 771 transitions. [2021-05-22 02:32:59,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:32:59,761 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:32:59,761 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:32:59,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5472,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:32:59,962 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:32:59,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:32:59,962 INFO L82 PathProgramCache]: Analyzing trace with hash 617057687, now seen corresponding path program 642 times [2021-05-22 02:32:59,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:32:59,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794269372] [2021-05-22 02:32:59,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:32:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:00,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:00,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794269372] [2021-05-22 02:33:00,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794269372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:00,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533519948] [2021-05-22 02:33:00,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:00,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:33:00,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:00,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-22 02:33:00,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:00,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533519948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:00,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:00,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:00,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113818673] [2021-05-22 02:33:00,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:00,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:00,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:00,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:00,630 INFO L87 Difference]: Start difference. First operand 343 states and 771 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:01,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:01,167 INFO L93 Difference]: Finished difference Result 386 states and 839 transitions. [2021-05-22 02:33:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:33:01,167 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:01,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:01,168 INFO L225 Difference]: With dead ends: 386 [2021-05-22 02:33:01,168 INFO L226 Difference]: Without dead ends: 375 [2021-05-22 02:33:01,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 871.7ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:33:01,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-22 02:33:01,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 345. [2021-05-22 02:33:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.252906976744186) internal successors, (775), 344 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 775 transitions. [2021-05-22 02:33:01,170 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 775 transitions. Word has length 20 [2021-05-22 02:33:01,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:01,170 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 775 transitions. [2021-05-22 02:33:01,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 775 transitions. [2021-05-22 02:33:01,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:01,171 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:01,171 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:01,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5487 [2021-05-22 02:33:01,371 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:01,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:01,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1951649017, now seen corresponding path program 643 times [2021-05-22 02:33:01,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:01,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851708207] [2021-05-22 02:33:01,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:01,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:01,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851708207] [2021-05-22 02:33:01,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851708207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:01,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259950838] [2021-05-22 02:33:01,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:01,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:01,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:01,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259950838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:01,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:01,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:01,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885415699] [2021-05-22 02:33:01,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:01,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:01,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:01,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:01,973 INFO L87 Difference]: Start difference. First operand 345 states and 775 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:02,760 INFO L93 Difference]: Finished difference Result 424 states and 902 transitions. [2021-05-22 02:33:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:33:02,761 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:02,761 INFO L225 Difference]: With dead ends: 424 [2021-05-22 02:33:02,761 INFO L226 Difference]: Without dead ends: 405 [2021-05-22 02:33:02,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 966.8ms TimeCoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:33:02,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-22 02:33:02,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 344. [2021-05-22 02:33:02,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.253644314868805) internal successors, (773), 343 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:02,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 773 transitions. [2021-05-22 02:33:02,764 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 773 transitions. Word has length 20 [2021-05-22 02:33:02,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:02,764 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 773 transitions. [2021-05-22 02:33:02,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:02,764 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 773 transitions. [2021-05-22 02:33:02,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:02,765 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:02,765 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:02,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5499,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:02,965 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:02,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:02,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1413793439, now seen corresponding path program 644 times [2021-05-22 02:33:02,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:02,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053592641] [2021-05-22 02:33:02,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:03,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:03,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053592641] [2021-05-22 02:33:03,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053592641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:03,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424988692] [2021-05-22 02:33:03,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:03,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:33:03,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:03,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:03,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:03,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424988692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:03,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:03,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:03,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349610727] [2021-05-22 02:33:03,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:03,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:03,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:03,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:03,561 INFO L87 Difference]: Start difference. First operand 344 states and 773 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:04,331 INFO L93 Difference]: Finished difference Result 416 states and 892 transitions. [2021-05-22 02:33:04,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:33:04,331 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:04,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:04,332 INFO L225 Difference]: With dead ends: 416 [2021-05-22 02:33:04,332 INFO L226 Difference]: Without dead ends: 394 [2021-05-22 02:33:04,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 957.4ms TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:33:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-22 02:33:04,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 344. [2021-05-22 02:33:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.253644314868805) internal successors, (773), 343 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 773 transitions. [2021-05-22 02:33:04,334 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 773 transitions. Word has length 20 [2021-05-22 02:33:04,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:04,335 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 773 transitions. [2021-05-22 02:33:04,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 773 transitions. [2021-05-22 02:33:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:04,335 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:04,335 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:04,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5512 [2021-05-22 02:33:04,535 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:04,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:04,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1339456967, now seen corresponding path program 645 times [2021-05-22 02:33:04,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:04,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633565945] [2021-05-22 02:33:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:04,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:04,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633565945] [2021-05-22 02:33:04,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633565945] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:04,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522102101] [2021-05-22 02:33:04,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:04,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:33:04,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:04,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:33:04,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:05,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522102101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:05,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:05,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:05,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166590907] [2021-05-22 02:33:05,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:05,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:05,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:05,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:05,182 INFO L87 Difference]: Start difference. First operand 344 states and 773 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:05,633 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-05-22 02:33:05,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:05,854 INFO L93 Difference]: Finished difference Result 374 states and 819 transitions. [2021-05-22 02:33:05,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:33:05,854 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:05,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:05,855 INFO L225 Difference]: With dead ends: 374 [2021-05-22 02:33:05,855 INFO L226 Difference]: Without dead ends: 367 [2021-05-22 02:33:05,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 896.5ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:33:05,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-22 02:33:05,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 347. [2021-05-22 02:33:05,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.254335260115607) internal successors, (780), 346 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 780 transitions. [2021-05-22 02:33:05,857 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 780 transitions. Word has length 20 [2021-05-22 02:33:05,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:05,857 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 780 transitions. [2021-05-22 02:33:05,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:05,857 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 780 transitions. [2021-05-22 02:33:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:05,858 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:05,858 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:06,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5524,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:06,058 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:06,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:06,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1378168599, now seen corresponding path program 646 times [2021-05-22 02:33:06,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:06,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866380527] [2021-05-22 02:33:06,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:06,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:06,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866380527] [2021-05-22 02:33:06,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866380527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:06,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928489934] [2021-05-22 02:33:06,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:06,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:33:06,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:06,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:06,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:06,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928489934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:06,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:06,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:06,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486474773] [2021-05-22 02:33:06,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:06,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:06,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:06,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:06,798 INFO L87 Difference]: Start difference. First operand 347 states and 780 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:07,349 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-05-22 02:33:07,996 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-05-22 02:33:08,259 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2021-05-22 02:33:08,441 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-05-22 02:33:08,567 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2021-05-22 02:33:08,787 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2021-05-22 02:33:09,273 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-05-22 02:33:09,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:09,291 INFO L93 Difference]: Finished difference Result 431 states and 914 transitions. [2021-05-22 02:33:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-22 02:33:09,291 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:09,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:09,292 INFO L225 Difference]: With dead ends: 431 [2021-05-22 02:33:09,292 INFO L226 Difference]: Without dead ends: 400 [2021-05-22 02:33:09,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 2676.3ms TimeCoverageRelationStatistics Valid=249, Invalid=1821, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:33:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-22 02:33:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 346. [2021-05-22 02:33:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.252173913043478) internal successors, (777), 345 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 777 transitions. [2021-05-22 02:33:09,295 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 777 transitions. Word has length 20 [2021-05-22 02:33:09,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:09,295 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 777 transitions. [2021-05-22 02:33:09,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:09,295 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 777 transitions. [2021-05-22 02:33:09,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:09,295 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:09,295 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:09,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5539,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:09,495 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:09,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1884514865, now seen corresponding path program 647 times [2021-05-22 02:33:09,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:09,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554908876] [2021-05-22 02:33:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:09,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:09,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554908876] [2021-05-22 02:33:09,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554908876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:09,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771691323] [2021-05-22 02:33:09,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:09,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:33:09,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:09,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:09,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:10,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771691323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:10,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:10,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:10,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604777603] [2021-05-22 02:33:10,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:10,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:10,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:10,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:10,156 INFO L87 Difference]: Start difference. First operand 346 states and 777 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:10,930 INFO L93 Difference]: Finished difference Result 388 states and 843 transitions. [2021-05-22 02:33:10,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:33:10,930 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:10,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:10,930 INFO L225 Difference]: With dead ends: 388 [2021-05-22 02:33:10,930 INFO L226 Difference]: Without dead ends: 377 [2021-05-22 02:33:10,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1062.6ms TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:33:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-22 02:33:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 348. [2021-05-22 02:33:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.250720461095101) internal successors, (781), 347 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:10,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 781 transitions. [2021-05-22 02:33:10,933 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 781 transitions. Word has length 20 [2021-05-22 02:33:10,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:10,933 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 781 transitions. [2021-05-22 02:33:10,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:10,933 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 781 transitions. [2021-05-22 02:33:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:10,933 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:10,933 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:11,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5553 [2021-05-22 02:33:11,134 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:11,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:11,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1075861101, now seen corresponding path program 648 times [2021-05-22 02:33:11,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:11,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139519934] [2021-05-22 02:33:11,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:11,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:11,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139519934] [2021-05-22 02:33:11,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139519934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:11,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502186270] [2021-05-22 02:33:11,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:11,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:33:11,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:11,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:11,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:11,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502186270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:11,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:11,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:11,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128122348] [2021-05-22 02:33:11,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:11,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:11,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:11,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:11,754 INFO L87 Difference]: Start difference. First operand 348 states and 781 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:12,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:12,823 INFO L93 Difference]: Finished difference Result 416 states and 895 transitions. [2021-05-22 02:33:12,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:33:12,823 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:12,824 INFO L225 Difference]: With dead ends: 416 [2021-05-22 02:33:12,824 INFO L226 Difference]: Without dead ends: 397 [2021-05-22 02:33:12,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1263.5ms TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:33:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-05-22 02:33:12,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 347. [2021-05-22 02:33:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.2514450867052025) internal successors, (779), 346 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 779 transitions. [2021-05-22 02:33:12,827 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 779 transitions. Word has length 20 [2021-05-22 02:33:12,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:12,827 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 779 transitions. [2021-05-22 02:33:12,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:12,827 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 779 transitions. [2021-05-22 02:33:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:12,827 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:12,827 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:13,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5565,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:13,028 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:13,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1613716679, now seen corresponding path program 649 times [2021-05-22 02:33:13,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:13,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223653450] [2021-05-22 02:33:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:13,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:13,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223653450] [2021-05-22 02:33:13,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223653450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:13,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455159515] [2021-05-22 02:33:13,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:13,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:33:13,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:13,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455159515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:13,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:13,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:13,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225959397] [2021-05-22 02:33:13,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:13,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:13,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:13,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:13,560 INFO L87 Difference]: Start difference. First operand 347 states and 779 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:14,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:14,413 INFO L93 Difference]: Finished difference Result 418 states and 896 transitions. [2021-05-22 02:33:14,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:33:14,414 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:14,414 INFO L225 Difference]: With dead ends: 418 [2021-05-22 02:33:14,414 INFO L226 Difference]: Without dead ends: 396 [2021-05-22 02:33:14,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 985.8ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:33:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-05-22 02:33:14,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 347. [2021-05-22 02:33:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.2514450867052025) internal successors, (779), 346 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 779 transitions. [2021-05-22 02:33:14,417 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 779 transitions. Word has length 20 [2021-05-22 02:33:14,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:14,417 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 779 transitions. [2021-05-22 02:33:14,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:14,417 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 779 transitions. [2021-05-22 02:33:14,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:14,417 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:14,417 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:14,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5578,650 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:14,618 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:14,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:14,618 INFO L82 PathProgramCache]: Analyzing trace with hash 401379927, now seen corresponding path program 650 times [2021-05-22 02:33:14,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:14,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270045797] [2021-05-22 02:33:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:14,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:14,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270045797] [2021-05-22 02:33:14,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270045797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:14,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059019544] [2021-05-22 02:33:14,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:14,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:33:14,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:14,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:33:14,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:15,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059019544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:15,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:15,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:15,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920605687] [2021-05-22 02:33:15,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:15,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:15,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:15,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:15,243 INFO L87 Difference]: Start difference. First operand 347 states and 779 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:16,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:16,274 INFO L93 Difference]: Finished difference Result 407 states and 874 transitions. [2021-05-22 02:33:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:33:16,274 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:16,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:16,275 INFO L225 Difference]: With dead ends: 407 [2021-05-22 02:33:16,275 INFO L226 Difference]: Without dead ends: 375 [2021-05-22 02:33:16,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1205.6ms TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:33:16,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-22 02:33:16,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 349. [2021-05-22 02:33:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.25) internal successors, (783), 348 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 783 transitions. [2021-05-22 02:33:16,277 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 783 transitions. Word has length 20 [2021-05-22 02:33:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:16,278 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 783 transitions. [2021-05-22 02:33:16,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 783 transitions. [2021-05-22 02:33:16,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:16,278 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:16,278 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:16,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5590 [2021-05-22 02:33:16,478 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:16,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1198115679, now seen corresponding path program 651 times [2021-05-22 02:33:16,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:16,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908909531] [2021-05-22 02:33:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:16,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:16,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908909531] [2021-05-22 02:33:16,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908909531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:16,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307124127] [2021-05-22 02:33:16,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:16,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:33:16,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:16,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-22 02:33:16,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:17,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307124127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:17,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:17,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:17,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108352207] [2021-05-22 02:33:17,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:17,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:17,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:17,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:17,080 INFO L87 Difference]: Start difference. First operand 349 states and 783 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:17,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:17,798 INFO L93 Difference]: Finished difference Result 417 states and 892 transitions. [2021-05-22 02:33:17,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:33:17,799 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:17,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:17,799 INFO L225 Difference]: With dead ends: 417 [2021-05-22 02:33:17,799 INFO L226 Difference]: Without dead ends: 395 [2021-05-22 02:33:17,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 901.4ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:33:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-22 02:33:17,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 348. [2021-05-22 02:33:17,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.250720461095101) internal successors, (781), 347 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:17,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 781 transitions. [2021-05-22 02:33:17,802 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 781 transitions. Word has length 20 [2021-05-22 02:33:17,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:17,802 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 781 transitions. [2021-05-22 02:33:17,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:17,802 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 781 transitions. [2021-05-22 02:33:17,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:17,802 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:17,802 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:18,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5605 [2021-05-22 02:33:18,003 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:18,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:18,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1704461945, now seen corresponding path program 652 times [2021-05-22 02:33:18,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:18,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763991207] [2021-05-22 02:33:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:18,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:18,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763991207] [2021-05-22 02:33:18,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763991207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:18,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638237190] [2021-05-22 02:33:18,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:18,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:33:18,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:18,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:33:18,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:18,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638237190] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:18,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:18,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:18,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726683239] [2021-05-22 02:33:18,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:18,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:18,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:18,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:18,559 INFO L87 Difference]: Start difference. First operand 348 states and 781 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:19,530 INFO L93 Difference]: Finished difference Result 422 states and 902 transitions. [2021-05-22 02:33:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:33:19,531 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:19,531 INFO L225 Difference]: With dead ends: 422 [2021-05-22 02:33:19,531 INFO L226 Difference]: Without dead ends: 397 [2021-05-22 02:33:19,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1013.9ms TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:33:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-05-22 02:33:19,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 348. [2021-05-22 02:33:19,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.250720461095101) internal successors, (781), 347 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 781 transitions. [2021-05-22 02:33:19,534 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 781 transitions. Word has length 20 [2021-05-22 02:33:19,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:19,534 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 781 transitions. [2021-05-22 02:33:19,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 781 transitions. [2021-05-22 02:33:19,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:19,534 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:19,534 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:19,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5618,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:19,735 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:19,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:19,735 INFO L82 PathProgramCache]: Analyzing trace with hash -702990113, now seen corresponding path program 653 times [2021-05-22 02:33:19,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:19,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349874700] [2021-05-22 02:33:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:19,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:19,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349874700] [2021-05-22 02:33:19,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349874700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:19,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301563398] [2021-05-22 02:33:19,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:20,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:33:20,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:20,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:33:20,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:20,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301563398] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:20,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:20,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:20,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007112017] [2021-05-22 02:33:20,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:20,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:20,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:20,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:20,399 INFO L87 Difference]: Start difference. First operand 348 states and 781 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:20,814 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-05-22 02:33:21,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:21,031 INFO L93 Difference]: Finished difference Result 376 states and 823 transitions. [2021-05-22 02:33:21,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:33:21,031 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:21,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:21,031 INFO L225 Difference]: With dead ends: 376 [2021-05-22 02:33:21,031 INFO L226 Difference]: Without dead ends: 369 [2021-05-22 02:33:21,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 897.4ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-05-22 02:33:21,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-22 02:33:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 349. [2021-05-22 02:33:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.2528735632183907) internal successors, (784), 348 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:21,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 784 transitions. [2021-05-22 02:33:21,034 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 784 transitions. Word has length 20 [2021-05-22 02:33:21,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:21,037 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 784 transitions. [2021-05-22 02:33:21,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 784 transitions. [2021-05-22 02:33:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:21,037 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:21,037 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:21,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 654 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5630 [2021-05-22 02:33:21,238 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:21,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:21,238 INFO L82 PathProgramCache]: Analyzing trace with hash 2014635453, now seen corresponding path program 654 times [2021-05-22 02:33:21,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:21,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672127084] [2021-05-22 02:33:21,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:21,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:21,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672127084] [2021-05-22 02:33:21,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672127084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:21,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837412781] [2021-05-22 02:33:21,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:21,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:33:21,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:21,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:21,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:21,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837412781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:21,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:21,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:21,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169198662] [2021-05-22 02:33:21,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:21,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:21,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:21,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:21,912 INFO L87 Difference]: Start difference. First operand 349 states and 784 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:22,601 INFO L93 Difference]: Finished difference Result 386 states and 843 transitions. [2021-05-22 02:33:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:33:22,601 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:22,602 INFO L225 Difference]: With dead ends: 386 [2021-05-22 02:33:22,602 INFO L226 Difference]: Without dead ends: 369 [2021-05-22 02:33:22,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 992.4ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:33:22,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-22 02:33:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 350. [2021-05-22 02:33:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.2492836676217767) internal successors, (785), 349 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 785 transitions. [2021-05-22 02:33:22,604 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 785 transitions. Word has length 20 [2021-05-22 02:33:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:22,605 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 785 transitions. [2021-05-22 02:33:22,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:22,605 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 785 transitions. [2021-05-22 02:33:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:22,605 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:22,605 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:22,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5645,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:22,805 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:22,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:22,806 INFO L82 PathProgramCache]: Analyzing trace with hash -945740513, now seen corresponding path program 655 times [2021-05-22 02:33:22,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:22,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831861421] [2021-05-22 02:33:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:23,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:23,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831861421] [2021-05-22 02:33:23,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831861421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:23,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502215446] [2021-05-22 02:33:23,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:23,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:23,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:23,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502215446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:23,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:23,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:23,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721080304] [2021-05-22 02:33:23,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:23,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:23,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:23,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:23,479 INFO L87 Difference]: Start difference. First operand 350 states and 785 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:23,795 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-05-22 02:33:24,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:24,874 INFO L93 Difference]: Finished difference Result 406 states and 878 transitions. [2021-05-22 02:33:24,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:33:24,874 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:24,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:24,874 INFO L225 Difference]: With dead ends: 406 [2021-05-22 02:33:24,875 INFO L226 Difference]: Without dead ends: 382 [2021-05-22 02:33:24,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1598.9ms TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:33:24,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-05-22 02:33:24,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 351. [2021-05-22 02:33:24,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.2514285714285713) internal successors, (788), 350 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 788 transitions. [2021-05-22 02:33:24,877 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 788 transitions. Word has length 20 [2021-05-22 02:33:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:24,877 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 788 transitions. [2021-05-22 02:33:24,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:24,877 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 788 transitions. [2021-05-22 02:33:24,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:24,878 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:24,878 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:25,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5657,656 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:25,078 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:25,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:25,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1773985577, now seen corresponding path program 656 times [2021-05-22 02:33:25,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:25,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270730147] [2021-05-22 02:33:25,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:25,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:25,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270730147] [2021-05-22 02:33:25,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270730147] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:25,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191807066] [2021-05-22 02:33:25,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:25,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:33:25,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:25,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:33:25,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:25,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191807066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:25,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:25,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:25,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438931973] [2021-05-22 02:33:25,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:25,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:25,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:25,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:25,685 INFO L87 Difference]: Start difference. First operand 351 states and 788 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:26,512 INFO L93 Difference]: Finished difference Result 402 states and 871 transitions. [2021-05-22 02:33:26,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:33:26,512 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:26,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:26,513 INFO L225 Difference]: With dead ends: 402 [2021-05-22 02:33:26,513 INFO L226 Difference]: Without dead ends: 377 [2021-05-22 02:33:26,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1052.9ms TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:33:26,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-05-22 02:33:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 351. [2021-05-22 02:33:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.2514285714285713) internal successors, (788), 350 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 788 transitions. [2021-05-22 02:33:26,515 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 788 transitions. Word has length 20 [2021-05-22 02:33:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:26,516 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 788 transitions. [2021-05-22 02:33:26,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 788 transitions. [2021-05-22 02:33:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:26,516 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:26,516 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:26,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5668 [2021-05-22 02:33:26,716 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:26,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:26,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1817095683, now seen corresponding path program 657 times [2021-05-22 02:33:26,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:26,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415873422] [2021-05-22 02:33:26,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:26,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:26,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415873422] [2021-05-22 02:33:26,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415873422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:26,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949746504] [2021-05-22 02:33:26,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:26,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-22 02:33:26,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:26,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-22 02:33:26,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:27,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949746504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:27,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:27,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:27,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052060191] [2021-05-22 02:33:27,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:27,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:27,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:27,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:27,317 INFO L87 Difference]: Start difference. First operand 351 states and 788 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:28,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:28,101 INFO L93 Difference]: Finished difference Result 404 states and 870 transitions. [2021-05-22 02:33:28,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:33:28,102 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:28,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:28,102 INFO L225 Difference]: With dead ends: 404 [2021-05-22 02:33:28,102 INFO L226 Difference]: Without dead ends: 375 [2021-05-22 02:33:28,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 991.6ms TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:33:28,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-05-22 02:33:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 352. [2021-05-22 02:33:28,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.247863247863248) internal successors, (789), 351 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:28,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 789 transitions. [2021-05-22 02:33:28,105 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 789 transitions. Word has length 20 [2021-05-22 02:33:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:28,105 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 789 transitions. [2021-05-22 02:33:28,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 789 transitions. [2021-05-22 02:33:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:28,105 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:28,105 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:28,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5683 [2021-05-22 02:33:28,306 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:28,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:28,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1037846781, now seen corresponding path program 658 times [2021-05-22 02:33:28,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:28,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727340243] [2021-05-22 02:33:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:28,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:28,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727340243] [2021-05-22 02:33:28,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727340243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:28,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642718803] [2021-05-22 02:33:28,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:28,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:33:28,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:28,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:33:28,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:28,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642718803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:28,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:28,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:28,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003967160] [2021-05-22 02:33:28,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:28,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:28,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:28,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:28,931 INFO L87 Difference]: Start difference. First operand 352 states and 789 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:29,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:29,816 INFO L93 Difference]: Finished difference Result 412 states and 884 transitions. [2021-05-22 02:33:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:33:29,816 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:29,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:29,816 INFO L225 Difference]: With dead ends: 412 [2021-05-22 02:33:29,817 INFO L226 Difference]: Without dead ends: 380 [2021-05-22 02:33:29,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1117.2ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:33:29,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-05-22 02:33:29,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 354. [2021-05-22 02:33:29,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.2464589235127477) internal successors, (793), 353 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 793 transitions. [2021-05-22 02:33:29,819 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 793 transitions. Word has length 20 [2021-05-22 02:33:29,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:29,819 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 793 transitions. [2021-05-22 02:33:29,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 793 transitions. [2021-05-22 02:33:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:29,820 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:29,820 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:30,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5697,659 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:30,020 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:30,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:30,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1834582533, now seen corresponding path program 659 times [2021-05-22 02:33:30,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:30,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745139557] [2021-05-22 02:33:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:30,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:30,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745139557] [2021-05-22 02:33:30,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745139557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:30,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356543662] [2021-05-22 02:33:30,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:30,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:33:30,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:30,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:30,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:30,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356543662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:30,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:30,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:30,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206600875] [2021-05-22 02:33:30,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:30,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:30,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:30,570 INFO L87 Difference]: Start difference. First operand 354 states and 793 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:31,372 INFO L93 Difference]: Finished difference Result 426 states and 910 transitions. [2021-05-22 02:33:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:33:31,372 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:31,372 INFO L225 Difference]: With dead ends: 426 [2021-05-22 02:33:31,372 INFO L226 Difference]: Without dead ends: 383 [2021-05-22 02:33:31,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 998.7ms TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:33:31,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-22 02:33:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 356. [2021-05-22 02:33:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.2450704225352114) internal successors, (797), 355 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:31,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 797 transitions. [2021-05-22 02:33:31,375 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 797 transitions. Word has length 20 [2021-05-22 02:33:31,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:31,375 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 797 transitions. [2021-05-22 02:33:31,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:31,375 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 797 transitions. [2021-05-22 02:33:31,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:31,376 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:31,376 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:31,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5712,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:31,576 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:31,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:31,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1954038497, now seen corresponding path program 660 times [2021-05-22 02:33:31,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:31,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752136975] [2021-05-22 02:33:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:31,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:31,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752136975] [2021-05-22 02:33:31,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752136975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:31,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561738894] [2021-05-22 02:33:31,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:31,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:33:31,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:31,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:32,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561738894] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:32,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:32,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:32,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885431617] [2021-05-22 02:33:32,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:32,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:32,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:32,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:32,169 INFO L87 Difference]: Start difference. First operand 356 states and 797 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:33,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:33,082 INFO L93 Difference]: Finished difference Result 430 states and 918 transitions. [2021-05-22 02:33:33,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:33:33,082 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:33,083 INFO L225 Difference]: With dead ends: 430 [2021-05-22 02:33:33,083 INFO L226 Difference]: Without dead ends: 405 [2021-05-22 02:33:33,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1026.5ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:33:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-22 02:33:33,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 356. [2021-05-22 02:33:33,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.2450704225352114) internal successors, (797), 355 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:33,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 797 transitions. [2021-05-22 02:33:33,086 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 797 transitions. Word has length 20 [2021-05-22 02:33:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:33,086 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 797 transitions. [2021-05-22 02:33:33,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 797 transitions. [2021-05-22 02:33:33,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:33,086 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:33,086 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:33,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5724,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:33,287 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:33,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:33,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1989663337, now seen corresponding path program 661 times [2021-05-22 02:33:33,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:33,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975503482] [2021-05-22 02:33:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:33,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:33,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975503482] [2021-05-22 02:33:33,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975503482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:33,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016346714] [2021-05-22 02:33:33,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:33,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:33:33,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:33,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016346714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:33,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:33,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:33,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728687576] [2021-05-22 02:33:33,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:33,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:33,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:33,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:33,910 INFO L87 Difference]: Start difference. First operand 356 states and 797 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:34,842 INFO L93 Difference]: Finished difference Result 417 states and 894 transitions. [2021-05-22 02:33:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:33:34,842 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:34,842 INFO L225 Difference]: With dead ends: 417 [2021-05-22 02:33:34,842 INFO L226 Difference]: Without dead ends: 385 [2021-05-22 02:33:34,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1136.4ms TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:33:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-05-22 02:33:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 359. [2021-05-22 02:33:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.2430167597765363) internal successors, (803), 358 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:34,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 803 transitions. [2021-05-22 02:33:34,845 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 803 transitions. Word has length 20 [2021-05-22 02:33:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:34,845 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 803 transitions. [2021-05-22 02:33:34,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 803 transitions. [2021-05-22 02:33:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:34,846 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:34,846 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:35,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 662 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5736 [2021-05-22 02:33:35,046 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:35,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:35,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1192927585, now seen corresponding path program 662 times [2021-05-22 02:33:35,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:35,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55035400] [2021-05-22 02:33:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:35,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:35,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55035400] [2021-05-22 02:33:35,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55035400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:35,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800893704] [2021-05-22 02:33:35,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:35,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:33:35,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:35,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:35,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:35,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800893704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:35,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:35,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:35,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234214031] [2021-05-22 02:33:35,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:35,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:35,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:35,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:35,687 INFO L87 Difference]: Start difference. First operand 359 states and 803 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:36,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:36,691 INFO L93 Difference]: Finished difference Result 431 states and 922 transitions. [2021-05-22 02:33:36,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:33:36,691 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:36,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:36,692 INFO L225 Difference]: With dead ends: 431 [2021-05-22 02:33:36,692 INFO L226 Difference]: Without dead ends: 390 [2021-05-22 02:33:36,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1243.1ms TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:33:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-05-22 02:33:36,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 361. [2021-05-22 02:33:36,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.2444444444444445) internal successors, (808), 360 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 808 transitions. [2021-05-22 02:33:36,695 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 808 transitions. Word has length 20 [2021-05-22 02:33:36,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:36,695 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 808 transitions. [2021-05-22 02:33:36,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 808 transitions. [2021-05-22 02:33:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:36,695 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:36,695 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:36,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5751,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:36,896 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:36,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:36,896 INFO L82 PathProgramCache]: Analyzing trace with hash -686581319, now seen corresponding path program 663 times [2021-05-22 02:33:36,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:36,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189346875] [2021-05-22 02:33:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:37,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:37,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189346875] [2021-05-22 02:33:37,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189346875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:37,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650350870] [2021-05-22 02:33:37,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:37,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:33:37,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:37,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-22 02:33:37,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:37,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650350870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:37,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:37,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:37,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677357206] [2021-05-22 02:33:37,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:37,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:37,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:37,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:37,528 INFO L87 Difference]: Start difference. First operand 361 states and 808 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:38,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:38,353 INFO L93 Difference]: Finished difference Result 431 states and 921 transitions. [2021-05-22 02:33:38,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:33:38,354 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:38,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:38,354 INFO L225 Difference]: With dead ends: 431 [2021-05-22 02:33:38,354 INFO L226 Difference]: Without dead ends: 406 [2021-05-22 02:33:38,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 996.6ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:33:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-22 02:33:38,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 361. [2021-05-22 02:33:38,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.2444444444444445) internal successors, (808), 360 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 808 transitions. [2021-05-22 02:33:38,357 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 808 transitions. Word has length 20 [2021-05-22 02:33:38,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:38,357 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 808 transitions. [2021-05-22 02:33:38,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:38,357 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 808 transitions. [2021-05-22 02:33:38,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:38,357 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:38,357 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:38,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5764,664 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:38,558 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:38,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:38,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2125251039, now seen corresponding path program 664 times [2021-05-22 02:33:38,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:38,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809756207] [2021-05-22 02:33:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:38,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:38,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809756207] [2021-05-22 02:33:38,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809756207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:38,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227941237] [2021-05-22 02:33:38,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:38,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:33:38,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:38,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:33:38,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:39,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227941237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:39,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:39,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:39,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610426164] [2021-05-22 02:33:39,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:39,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:39,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:39,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:39,137 INFO L87 Difference]: Start difference. First operand 361 states and 808 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:40,206 INFO L93 Difference]: Finished difference Result 435 states and 929 transitions. [2021-05-22 02:33:40,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:33:40,206 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:40,206 INFO L225 Difference]: With dead ends: 435 [2021-05-22 02:33:40,206 INFO L226 Difference]: Without dead ends: 407 [2021-05-22 02:33:40,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1178.6ms TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:33:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-05-22 02:33:40,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 362. [2021-05-22 02:33:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.2437673130193905) internal successors, (810), 361 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 810 transitions. [2021-05-22 02:33:40,209 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 810 transitions. Word has length 20 [2021-05-22 02:33:40,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:40,209 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 810 transitions. [2021-05-22 02:33:40,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:40,209 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 810 transitions. [2021-05-22 02:33:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:40,210 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:40,210 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:40,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5776,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:40,410 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:40,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:40,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1847613177, now seen corresponding path program 665 times [2021-05-22 02:33:40,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:40,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447424731] [2021-05-22 02:33:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:40,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:40,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447424731] [2021-05-22 02:33:40,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447424731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:40,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595421419] [2021-05-22 02:33:40,623 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:40,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:33:40,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:40,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:33:40,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:41,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595421419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:41,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:41,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:41,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951709018] [2021-05-22 02:33:41,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:41,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:41,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:41,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:41,062 INFO L87 Difference]: Start difference. First operand 362 states and 810 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:41,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:41,448 INFO L93 Difference]: Finished difference Result 382 states and 841 transitions. [2021-05-22 02:33:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:33:41,449 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:41,449 INFO L225 Difference]: With dead ends: 382 [2021-05-22 02:33:41,449 INFO L226 Difference]: Without dead ends: 369 [2021-05-22 02:33:41,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 670.2ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:33:41,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-22 02:33:41,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 366. [2021-05-22 02:33:41,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.241095890410959) internal successors, (818), 365 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 818 transitions. [2021-05-22 02:33:41,452 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 818 transitions. Word has length 20 [2021-05-22 02:33:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:41,452 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 818 transitions. [2021-05-22 02:33:41,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 818 transitions. [2021-05-22 02:33:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:41,452 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:41,452 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:41,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5789 [2021-05-22 02:33:41,653 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:41,653 INFO L82 PathProgramCache]: Analyzing trace with hash 270271447, now seen corresponding path program 666 times [2021-05-22 02:33:41,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:41,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810476827] [2021-05-22 02:33:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:41,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:41,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810476827] [2021-05-22 02:33:41,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810476827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:41,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32160642] [2021-05-22 02:33:41,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:41,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:33:41,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:41,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:41,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:42,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32160642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:42,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:42,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:42,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383488942] [2021-05-22 02:33:42,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:42,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:42,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:42,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:42,354 INFO L87 Difference]: Start difference. First operand 366 states and 818 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:43,031 INFO L93 Difference]: Finished difference Result 406 states and 880 transitions. [2021-05-22 02:33:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:33:43,031 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:43,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:43,032 INFO L225 Difference]: With dead ends: 406 [2021-05-22 02:33:43,032 INFO L226 Difference]: Without dead ends: 395 [2021-05-22 02:33:43,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 975.4ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:33:43,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-05-22 02:33:43,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 367. [2021-05-22 02:33:43,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.240437158469945) internal successors, (820), 366 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 820 transitions. [2021-05-22 02:33:43,034 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 820 transitions. Word has length 20 [2021-05-22 02:33:43,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:43,035 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 820 transitions. [2021-05-22 02:33:43,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:43,035 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 820 transitions. [2021-05-22 02:33:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:43,035 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:43,035 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:43,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5801,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:43,235 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:43,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:43,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1604862777, now seen corresponding path program 667 times [2021-05-22 02:33:43,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:43,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594113325] [2021-05-22 02:33:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:43,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:43,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594113325] [2021-05-22 02:33:43,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594113325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:43,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285098370] [2021-05-22 02:33:43,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:43,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:33:43,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:43,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:43,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285098370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:43,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:43,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:43,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057821178] [2021-05-22 02:33:43,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:43,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:43,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:43,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:43,867 INFO L87 Difference]: Start difference. First operand 367 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:45,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:45,021 INFO L93 Difference]: Finished difference Result 455 states and 963 transitions. [2021-05-22 02:33:45,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-22 02:33:45,021 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:45,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:45,022 INFO L225 Difference]: With dead ends: 455 [2021-05-22 02:33:45,022 INFO L226 Difference]: Without dead ends: 429 [2021-05-22 02:33:45,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1203.0ms TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:33:45,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-22 02:33:45,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 365. [2021-05-22 02:33:45,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.241758241758242) internal successors, (816), 364 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:45,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 816 transitions. [2021-05-22 02:33:45,025 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 816 transitions. Word has length 20 [2021-05-22 02:33:45,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:45,025 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 816 transitions. [2021-05-22 02:33:45,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:45,025 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 816 transitions. [2021-05-22 02:33:45,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:45,025 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:45,025 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:45,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5813,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:45,226 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:45,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:45,226 INFO L82 PathProgramCache]: Analyzing trace with hash 776617713, now seen corresponding path program 668 times [2021-05-22 02:33:45,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:45,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424020076] [2021-05-22 02:33:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:45,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:45,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424020076] [2021-05-22 02:33:45,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424020076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:45,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109937660] [2021-05-22 02:33:45,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:45,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:33:45,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:45,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:33:45,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:45,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109937660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:45,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:45,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:45,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982435443] [2021-05-22 02:33:45,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:45,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:45,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:45,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:45,844 INFO L87 Difference]: Start difference. First operand 365 states and 816 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:46,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:46,866 INFO L93 Difference]: Finished difference Result 417 states and 901 transitions. [2021-05-22 02:33:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:33:46,866 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:46,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:46,866 INFO L225 Difference]: With dead ends: 417 [2021-05-22 02:33:46,866 INFO L226 Difference]: Without dead ends: 392 [2021-05-22 02:33:46,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1248.6ms TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:33:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-05-22 02:33:46,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 366. [2021-05-22 02:33:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.241095890410959) internal successors, (818), 365 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 818 transitions. [2021-05-22 02:33:46,869 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 818 transitions. Word has length 20 [2021-05-22 02:33:46,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:46,869 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 818 transitions. [2021-05-22 02:33:46,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:46,869 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 818 transitions. [2021-05-22 02:33:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:46,870 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:46,870 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:47,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5825 [2021-05-22 02:33:47,070 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:47,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:47,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1573353465, now seen corresponding path program 669 times [2021-05-22 02:33:47,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:47,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770003540] [2021-05-22 02:33:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:47,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:47,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770003540] [2021-05-22 02:33:47,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770003540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:47,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141807294] [2021-05-22 02:33:47,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:47,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:33:47,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:47,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-22 02:33:47,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:47,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141807294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:47,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:47,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:47,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274256628] [2021-05-22 02:33:47,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:47,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:47,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:47,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:47,639 INFO L87 Difference]: Start difference. First operand 366 states and 818 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:48,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:48,254 INFO L93 Difference]: Finished difference Result 435 states and 929 transitions. [2021-05-22 02:33:48,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:33:48,255 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:48,255 INFO L225 Difference]: With dead ends: 435 [2021-05-22 02:33:48,255 INFO L226 Difference]: Without dead ends: 413 [2021-05-22 02:33:48,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 712.0ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:33:48,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-22 02:33:48,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 365. [2021-05-22 02:33:48,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.241758241758242) internal successors, (816), 364 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:48,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 816 transitions. [2021-05-22 02:33:48,258 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 816 transitions. Word has length 20 [2021-05-22 02:33:48,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:48,258 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 816 transitions. [2021-05-22 02:33:48,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:48,258 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 816 transitions. [2021-05-22 02:33:48,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:48,259 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:48,259 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:48,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5840,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:48,459 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:48,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:48,459 INFO L82 PathProgramCache]: Analyzing trace with hash -706517225, now seen corresponding path program 670 times [2021-05-22 02:33:48,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:48,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266467187] [2021-05-22 02:33:48,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:48,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:48,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266467187] [2021-05-22 02:33:48,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266467187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:48,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513029932] [2021-05-22 02:33:48,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:48,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:33:48,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:48,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:48,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:49,245 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:49,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513029932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:49,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:49,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:49,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92246098] [2021-05-22 02:33:49,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:49,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:49,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:49,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:49,246 INFO L87 Difference]: Start difference. First operand 365 states and 816 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:50,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:50,403 INFO L93 Difference]: Finished difference Result 418 states and 903 transitions. [2021-05-22 02:33:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:33:50,403 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:50,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:50,403 INFO L225 Difference]: With dead ends: 418 [2021-05-22 02:33:50,403 INFO L226 Difference]: Without dead ends: 393 [2021-05-22 02:33:50,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1399.8ms TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:33:50,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-05-22 02:33:50,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 367. [2021-05-22 02:33:50,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.240437158469945) internal successors, (820), 366 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:50,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 820 transitions. [2021-05-22 02:33:50,406 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 820 transitions. Word has length 20 [2021-05-22 02:33:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:50,406 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 820 transitions. [2021-05-22 02:33:50,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:50,406 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 820 transitions. [2021-05-22 02:33:50,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:50,407 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:50,407 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:50,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5852,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:50,607 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash 90218527, now seen corresponding path program 671 times [2021-05-22 02:33:50,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:50,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575341999] [2021-05-22 02:33:50,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:50,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:50,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575341999] [2021-05-22 02:33:50,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575341999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:50,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511284925] [2021-05-22 02:33:50,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:50,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:33:50,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:50,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:50,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:51,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511284925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:51,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:51,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:51,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181381897] [2021-05-22 02:33:51,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:51,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:51,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:51,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:51,157 INFO L87 Difference]: Start difference. First operand 367 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:52,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:52,000 INFO L93 Difference]: Finished difference Result 439 states and 937 transitions. [2021-05-22 02:33:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:33:52,000 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:52,001 INFO L225 Difference]: With dead ends: 439 [2021-05-22 02:33:52,001 INFO L226 Difference]: Without dead ends: 396 [2021-05-22 02:33:52,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1009.4ms TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:33:52,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-05-22 02:33:52,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 366. [2021-05-22 02:33:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.241095890410959) internal successors, (818), 365 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:52,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 818 transitions. [2021-05-22 02:33:52,003 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 818 transitions. Word has length 20 [2021-05-22 02:33:52,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:52,004 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 818 transitions. [2021-05-22 02:33:52,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:52,004 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 818 transitions. [2021-05-22 02:33:52,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:52,004 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:52,004 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:52,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5866,672 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:52,204 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:52,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:52,205 INFO L82 PathProgramCache]: Analyzing trace with hash 596564793, now seen corresponding path program 672 times [2021-05-22 02:33:52,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:52,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840684370] [2021-05-22 02:33:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:52,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:52,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840684370] [2021-05-22 02:33:52,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840684370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:52,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662275961] [2021-05-22 02:33:52,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:52,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:33:52,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:52,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:52,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:52,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662275961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:52,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:52,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:52,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205991214] [2021-05-22 02:33:52,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:52,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:52,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:52,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:52,812 INFO L87 Difference]: Start difference. First operand 366 states and 818 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:53,533 INFO L93 Difference]: Finished difference Result 440 states and 939 transitions. [2021-05-22 02:33:53,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:33:53,534 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:53,534 INFO L225 Difference]: With dead ends: 440 [2021-05-22 02:33:53,534 INFO L226 Difference]: Without dead ends: 415 [2021-05-22 02:33:53,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 894.2ms TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:33:53,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-22 02:33:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 365. [2021-05-22 02:33:53,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.241758241758242) internal successors, (816), 364 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 816 transitions. [2021-05-22 02:33:53,537 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 816 transitions. Word has length 20 [2021-05-22 02:33:53,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:53,537 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 816 transitions. [2021-05-22 02:33:53,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 816 transitions. [2021-05-22 02:33:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:53,537 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:53,538 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:53,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5878,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:53,738 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:53,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:53,738 INFO L82 PathProgramCache]: Analyzing trace with hash 560939953, now seen corresponding path program 673 times [2021-05-22 02:33:53,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:53,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910239695] [2021-05-22 02:33:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:53,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:53,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910239695] [2021-05-22 02:33:53,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910239695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:53,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9071511] [2021-05-22 02:33:53,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:54,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:33:54,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:54,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9071511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:54,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:54,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:54,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432559808] [2021-05-22 02:33:54,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:54,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:54,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:54,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:54,422 INFO L87 Difference]: Start difference. First operand 365 states and 816 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:55,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:55,286 INFO L93 Difference]: Finished difference Result 419 states and 905 transitions. [2021-05-22 02:33:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:33:55,286 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:55,286 INFO L225 Difference]: With dead ends: 419 [2021-05-22 02:33:55,286 INFO L226 Difference]: Without dead ends: 394 [2021-05-22 02:33:55,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1128.3ms TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:33:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-22 02:33:55,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 368. [2021-05-22 02:33:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.239782016348774) internal successors, (822), 367 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 822 transitions. [2021-05-22 02:33:55,289 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 822 transitions. Word has length 20 [2021-05-22 02:33:55,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:55,289 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 822 transitions. [2021-05-22 02:33:55,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:55,289 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 822 transitions. [2021-05-22 02:33:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:55,290 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:55,290 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:55,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5890 [2021-05-22 02:33:55,490 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:55,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:55,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1357675705, now seen corresponding path program 674 times [2021-05-22 02:33:55,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:55,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488289677] [2021-05-22 02:33:55,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:55,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:55,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488289677] [2021-05-22 02:33:55,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488289677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:55,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823665207] [2021-05-22 02:33:55,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:55,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:33:55,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:55,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:55,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:56,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823665207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:56,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:56,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:56,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858698901] [2021-05-22 02:33:56,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:56,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:56,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:56,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:56,064 INFO L87 Difference]: Start difference. First operand 368 states and 822 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:56,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:56,758 INFO L93 Difference]: Finished difference Result 439 states and 939 transitions. [2021-05-22 02:33:56,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:33:56,758 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:56,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:56,759 INFO L225 Difference]: With dead ends: 439 [2021-05-22 02:33:56,759 INFO L226 Difference]: Without dead ends: 417 [2021-05-22 02:33:56,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 897.3ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:33:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-22 02:33:56,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 367. [2021-05-22 02:33:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.240437158469945) internal successors, (820), 366 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 820 transitions. [2021-05-22 02:33:56,762 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 820 transitions. Word has length 20 [2021-05-22 02:33:56,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:56,762 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 820 transitions. [2021-05-22 02:33:56,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:56,762 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 820 transitions. [2021-05-22 02:33:56,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:56,762 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:56,762 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:56,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5902,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:56,963 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:56,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:56,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1864021971, now seen corresponding path program 675 times [2021-05-22 02:33:56,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:56,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908579409] [2021-05-22 02:33:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:57,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:57,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908579409] [2021-05-22 02:33:57,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908579409] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:57,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156818359] [2021-05-22 02:33:57,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:57,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:33:57,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:57,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:33:57,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:57,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156818359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:57,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:57,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:57,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513970057] [2021-05-22 02:33:57,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:57,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:57,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:57,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:57,567 INFO L87 Difference]: Start difference. First operand 367 states and 820 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:58,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:33:58,689 INFO L93 Difference]: Finished difference Result 464 states and 980 transitions. [2021-05-22 02:33:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:33:58,689 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:33:58,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:33:58,689 INFO L225 Difference]: With dead ends: 464 [2021-05-22 02:33:58,689 INFO L226 Difference]: Without dead ends: 404 [2021-05-22 02:33:58,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1274.8ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:33:58,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-22 02:33:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 370. [2021-05-22 02:33:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.238482384823848) internal successors, (826), 369 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 826 transitions. [2021-05-22 02:33:58,692 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 826 transitions. Word has length 20 [2021-05-22 02:33:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:33:58,693 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 826 transitions. [2021-05-22 02:33:58,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:33:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 826 transitions. [2021-05-22 02:33:58,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:33:58,693 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:33:58,693 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:33:58,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5914 [2021-05-22 02:33:58,893 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:33:58,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:33:58,894 INFO L82 PathProgramCache]: Analyzing trace with hash 380887033, now seen corresponding path program 676 times [2021-05-22 02:33:58,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:33:58,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874230424] [2021-05-22 02:33:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:33:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:33:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:59,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:33:59,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874230424] [2021-05-22 02:33:59,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874230424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:59,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442480436] [2021-05-22 02:33:59,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:33:59,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:33:59,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:33:59,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:33:59,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:33:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:33:59,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442480436] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:33:59,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:33:59,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:33:59,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290693619] [2021-05-22 02:33:59,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:33:59,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:33:59,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:33:59,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:33:59,475 INFO L87 Difference]: Start difference. First operand 370 states and 826 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:00,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:00,609 INFO L93 Difference]: Finished difference Result 445 states and 949 transitions. [2021-05-22 02:34:00,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:34:00,609 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:00,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:00,610 INFO L225 Difference]: With dead ends: 445 [2021-05-22 02:34:00,610 INFO L226 Difference]: Without dead ends: 417 [2021-05-22 02:34:00,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1182.1ms TimeCoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:34:00,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-22 02:34:00,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 370. [2021-05-22 02:34:00,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.238482384823848) internal successors, (826), 369 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:00,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 826 transitions. [2021-05-22 02:34:00,613 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 826 transitions. Word has length 20 [2021-05-22 02:34:00,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:00,613 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 826 transitions. [2021-05-22 02:34:00,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:00,613 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 826 transitions. [2021-05-22 02:34:00,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:00,613 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:00,613 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:00,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5926,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:00,814 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:00,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:00,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1197406807, now seen corresponding path program 677 times [2021-05-22 02:34:00,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:00,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139650355] [2021-05-22 02:34:00,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:01,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:01,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139650355] [2021-05-22 02:34:01,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139650355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:01,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013630831] [2021-05-22 02:34:01,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:01,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:34:01,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:01,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:34:01,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:01,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013630831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:01,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:01,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:01,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345403518] [2021-05-22 02:34:01,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:01,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:01,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:01,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:01,517 INFO L87 Difference]: Start difference. First operand 370 states and 826 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:02,001 INFO L93 Difference]: Finished difference Result 405 states and 886 transitions. [2021-05-22 02:34:02,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:34:02,001 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:02,002 INFO L225 Difference]: With dead ends: 405 [2021-05-22 02:34:02,002 INFO L226 Difference]: Without dead ends: 394 [2021-05-22 02:34:02,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 860.5ms TimeCoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:34:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-22 02:34:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 375. [2021-05-22 02:34:02,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 2.235294117647059) internal successors, (836), 374 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:02,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 836 transitions. [2021-05-22 02:34:02,005 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 836 transitions. Word has length 20 [2021-05-22 02:34:02,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:02,005 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 836 transitions. [2021-05-22 02:34:02,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:02,005 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 836 transitions. [2021-05-22 02:34:02,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:02,005 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:02,005 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:02,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5939 [2021-05-22 02:34:02,206 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:02,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:02,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1762969159, now seen corresponding path program 678 times [2021-05-22 02:34:02,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:02,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897467603] [2021-05-22 02:34:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:02,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:02,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897467603] [2021-05-22 02:34:02,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897467603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:02,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041242334] [2021-05-22 02:34:02,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:02,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-22 02:34:02,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:02,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:34:02,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:02,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041242334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:02,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:02,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:02,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394232610] [2021-05-22 02:34:02,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:02,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:02,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:02,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:02,818 INFO L87 Difference]: Start difference. First operand 375 states and 836 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:03,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:03,594 INFO L93 Difference]: Finished difference Result 452 states and 959 transitions. [2021-05-22 02:34:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:34:03,595 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:03,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:03,595 INFO L225 Difference]: With dead ends: 452 [2021-05-22 02:34:03,595 INFO L226 Difference]: Without dead ends: 433 [2021-05-22 02:34:03,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 959.1ms TimeCoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:34:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-05-22 02:34:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 374. [2021-05-22 02:34:03,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.2359249329758715) internal successors, (834), 373 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:03,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 834 transitions. [2021-05-22 02:34:03,598 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 834 transitions. Word has length 20 [2021-05-22 02:34:03,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:03,598 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 834 transitions. [2021-05-22 02:34:03,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:03,598 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 834 transitions. [2021-05-22 02:34:03,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:03,599 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:03,599 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:03,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5951,679 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:03,799 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:03,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:03,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1994142559, now seen corresponding path program 679 times [2021-05-22 02:34:03,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:03,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749935350] [2021-05-22 02:34:03,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:03,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:03,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749935350] [2021-05-22 02:34:03,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749935350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:03,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75216340] [2021-05-22 02:34:03,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:04,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:04,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:04,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75216340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:04,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:04,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:04,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379376675] [2021-05-22 02:34:04,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:04,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:04,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:04,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:04,323 INFO L87 Difference]: Start difference. First operand 374 states and 834 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:05,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:05,178 INFO L93 Difference]: Finished difference Result 448 states and 959 transitions. [2021-05-22 02:34:05,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:34:05,179 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:05,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:05,179 INFO L225 Difference]: With dead ends: 448 [2021-05-22 02:34:05,179 INFO L226 Difference]: Without dead ends: 429 [2021-05-22 02:34:05,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 960.8ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:34:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-22 02:34:05,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 373. [2021-05-22 02:34:05,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.236559139784946) internal successors, (832), 372 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 832 transitions. [2021-05-22 02:34:05,182 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 832 transitions. Word has length 20 [2021-05-22 02:34:05,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:05,182 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 832 transitions. [2021-05-22 02:34:05,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:05,182 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 832 transitions. [2021-05-22 02:34:05,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:05,182 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:05,183 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:05,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5964,680 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:05,383 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:05,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:05,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1794478471, now seen corresponding path program 680 times [2021-05-22 02:34:05,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:05,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667809218] [2021-05-22 02:34:05,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:05,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:05,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667809218] [2021-05-22 02:34:05,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667809218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:05,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205986632] [2021-05-22 02:34:05,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:05,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:34:05,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:05,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:05,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:05,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205986632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:05,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:05,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:05,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084426766] [2021-05-22 02:34:05,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:05,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:05,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:05,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:05,994 INFO L87 Difference]: Start difference. First operand 373 states and 832 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:06,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:06,837 INFO L93 Difference]: Finished difference Result 454 states and 960 transitions. [2021-05-22 02:34:06,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:34:06,837 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:06,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:06,837 INFO L225 Difference]: With dead ends: 454 [2021-05-22 02:34:06,838 INFO L226 Difference]: Without dead ends: 419 [2021-05-22 02:34:06,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1063.4ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-05-22 02:34:06,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-05-22 02:34:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 373. [2021-05-22 02:34:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.236559139784946) internal successors, (832), 372 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 832 transitions. [2021-05-22 02:34:06,841 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 832 transitions. Word has length 20 [2021-05-22 02:34:06,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:06,841 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 832 transitions. [2021-05-22 02:34:06,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 832 transitions. [2021-05-22 02:34:06,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:06,841 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:06,841 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:07,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5976,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:07,042 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:07,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:07,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1017353887, now seen corresponding path program 681 times [2021-05-22 02:34:07,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:07,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082378375] [2021-05-22 02:34:07,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:07,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:07,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082378375] [2021-05-22 02:34:07,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082378375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:07,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216403005] [2021-05-22 02:34:07,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:07,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:34:07,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:07,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-22 02:34:07,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:07,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216403005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:07,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:07,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:07,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860845512] [2021-05-22 02:34:07,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:07,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:07,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:07,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:07,780 INFO L87 Difference]: Start difference. First operand 373 states and 832 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:08,747 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-05-22 02:34:08,959 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2021-05-22 02:34:09,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:09,094 INFO L93 Difference]: Finished difference Result 462 states and 978 transitions. [2021-05-22 02:34:09,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:34:09,094 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:09,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:09,095 INFO L225 Difference]: With dead ends: 462 [2021-05-22 02:34:09,095 INFO L226 Difference]: Without dead ends: 434 [2021-05-22 02:34:09,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1566.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2021-05-22 02:34:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-05-22 02:34:09,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 373. [2021-05-22 02:34:09,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.236559139784946) internal successors, (832), 372 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:09,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 832 transitions. [2021-05-22 02:34:09,098 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 832 transitions. Word has length 20 [2021-05-22 02:34:09,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:09,098 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 832 transitions. [2021-05-22 02:34:09,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:09,098 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 832 transitions. [2021-05-22 02:34:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:09,098 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:09,098 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:09,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 682 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5990 [2021-05-22 02:34:09,299 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:09,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:09,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2010156231, now seen corresponding path program 682 times [2021-05-22 02:34:09,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:09,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711532420] [2021-05-22 02:34:09,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:09,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:09,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711532420] [2021-05-22 02:34:09,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711532420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:09,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113627377] [2021-05-22 02:34:09,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:09,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:34:09,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:09,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:34:09,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:10,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113627377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:10,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:10,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:10,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962387974] [2021-05-22 02:34:10,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:10,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:10,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:10,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:10,010 INFO L87 Difference]: Start difference. First operand 373 states and 832 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:11,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:11,213 INFO L93 Difference]: Finished difference Result 462 states and 976 transitions. [2021-05-22 02:34:11,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:34:11,213 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:11,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:11,214 INFO L225 Difference]: With dead ends: 462 [2021-05-22 02:34:11,214 INFO L226 Difference]: Without dead ends: 421 [2021-05-22 02:34:11,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1379.8ms TimeCoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:34:11,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-05-22 02:34:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 374. [2021-05-22 02:34:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.2359249329758715) internal successors, (834), 373 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 834 transitions. [2021-05-22 02:34:11,217 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 834 transitions. Word has length 20 [2021-05-22 02:34:11,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:11,217 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 834 transitions. [2021-05-22 02:34:11,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:11,217 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 834 transitions. [2021-05-22 02:34:11,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:11,217 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:11,217 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:11,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 683 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6003 [2021-05-22 02:34:11,417 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:11,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:11,418 INFO L82 PathProgramCache]: Analyzing trace with hash -876135871, now seen corresponding path program 683 times [2021-05-22 02:34:11,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:11,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859644306] [2021-05-22 02:34:11,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:11,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:11,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859644306] [2021-05-22 02:34:11,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859644306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:11,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991478302] [2021-05-22 02:34:11,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:11,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:34:11,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:11,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:11,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:12,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991478302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:12,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:12,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:12,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644405150] [2021-05-22 02:34:12,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:12,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:12,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:12,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:12,043 INFO L87 Difference]: Start difference. First operand 374 states and 834 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:12,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:12,500 INFO L93 Difference]: Finished difference Result 394 states and 865 transitions. [2021-05-22 02:34:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:34:12,500 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:12,501 INFO L225 Difference]: With dead ends: 394 [2021-05-22 02:34:12,501 INFO L226 Difference]: Without dead ends: 387 [2021-05-22 02:34:12,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 778.2ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:34:12,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-05-22 02:34:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 377. [2021-05-22 02:34:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.234042553191489) internal successors, (840), 376 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:12,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 840 transitions. [2021-05-22 02:34:12,504 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 840 transitions. Word has length 20 [2021-05-22 02:34:12,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:12,504 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 840 transitions. [2021-05-22 02:34:12,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:12,504 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 840 transitions. [2021-05-22 02:34:12,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:12,504 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:12,504 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:12,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 684 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6015 [2021-05-22 02:34:12,705 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:12,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:12,705 INFO L82 PathProgramCache]: Analyzing trace with hash -578082913, now seen corresponding path program 684 times [2021-05-22 02:34:12,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:12,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111386965] [2021-05-22 02:34:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:12,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:12,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111386965] [2021-05-22 02:34:12,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111386965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:12,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571153709] [2021-05-22 02:34:12,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:12,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:34:12,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:12,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:34:12,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:13,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571153709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:13,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:13,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:13,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681327799] [2021-05-22 02:34:13,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:13,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:13,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:13,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:13,394 INFO L87 Difference]: Start difference. First operand 377 states and 840 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:13,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:13,906 INFO L93 Difference]: Finished difference Result 403 states and 876 transitions. [2021-05-22 02:34:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:34:13,906 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:13,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:13,907 INFO L225 Difference]: With dead ends: 403 [2021-05-22 02:34:13,907 INFO L226 Difference]: Without dead ends: 378 [2021-05-22 02:34:13,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 896.1ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:34:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-22 02:34:13,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 376. [2021-05-22 02:34:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2346666666666666) internal successors, (838), 375 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 838 transitions. [2021-05-22 02:34:13,909 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 838 transitions. Word has length 20 [2021-05-22 02:34:13,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:13,909 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 838 transitions. [2021-05-22 02:34:13,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:13,910 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 838 transitions. [2021-05-22 02:34:13,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:13,910 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:13,910 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:14,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6030 [2021-05-22 02:34:14,110 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:14,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:14,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2063931009, now seen corresponding path program 685 times [2021-05-22 02:34:14,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:14,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507015304] [2021-05-22 02:34:14,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:14,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:14,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507015304] [2021-05-22 02:34:14,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507015304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:14,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782699419] [2021-05-22 02:34:14,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:14,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:14,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:14,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782699419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:14,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:14,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:14,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141359068] [2021-05-22 02:34:14,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:14,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:14,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:14,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:14,757 INFO L87 Difference]: Start difference. First operand 376 states and 838 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:15,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:15,190 INFO L93 Difference]: Finished difference Result 392 states and 861 transitions. [2021-05-22 02:34:15,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:34:15,190 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:15,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:15,190 INFO L225 Difference]: With dead ends: 392 [2021-05-22 02:34:15,190 INFO L226 Difference]: Without dead ends: 379 [2021-05-22 02:34:15,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 782.9ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-05-22 02:34:15,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-22 02:34:15,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 377. [2021-05-22 02:34:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.234042553191489) internal successors, (840), 376 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 840 transitions. [2021-05-22 02:34:15,193 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 840 transitions. Word has length 20 [2021-05-22 02:34:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:15,193 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 840 transitions. [2021-05-22 02:34:15,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 840 transitions. [2021-05-22 02:34:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:15,194 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:15,194 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:15,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6042,686 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:15,394 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:15,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:15,394 INFO L82 PathProgramCache]: Analyzing trace with hash 486589279, now seen corresponding path program 686 times [2021-05-22 02:34:15,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:15,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254084740] [2021-05-22 02:34:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:15,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:15,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254084740] [2021-05-22 02:34:15,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254084740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:15,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170964965] [2021-05-22 02:34:15,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:15,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:34:15,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:15,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:34:15,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:16,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170964965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:16,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:16,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:16,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759520596] [2021-05-22 02:34:16,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:16,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:16,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:16,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:16,143 INFO L87 Difference]: Start difference. First operand 377 states and 840 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:16,918 INFO L93 Difference]: Finished difference Result 416 states and 900 transitions. [2021-05-22 02:34:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-22 02:34:16,918 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:16,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:16,919 INFO L225 Difference]: With dead ends: 416 [2021-05-22 02:34:16,919 INFO L226 Difference]: Without dead ends: 405 [2021-05-22 02:34:16,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1151.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:34:16,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-22 02:34:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 378. [2021-05-22 02:34:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.2334217506631298) internal successors, (842), 377 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:16,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 842 transitions. [2021-05-22 02:34:16,922 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 842 transitions. Word has length 20 [2021-05-22 02:34:16,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:16,922 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 842 transitions. [2021-05-22 02:34:16,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:16,922 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 842 transitions. [2021-05-22 02:34:16,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:16,922 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:16,922 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:17,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 687 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6054 [2021-05-22 02:34:17,123 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:17,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:17,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1821180609, now seen corresponding path program 687 times [2021-05-22 02:34:17,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:17,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119096303] [2021-05-22 02:34:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:17,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:17,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119096303] [2021-05-22 02:34:17,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119096303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:17,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131129411] [2021-05-22 02:34:17,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:17,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:34:17,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:17,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-22 02:34:17,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:17,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131129411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:17,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:17,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:17,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778493694] [2021-05-22 02:34:17,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:17,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:17,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:17,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:17,902 INFO L87 Difference]: Start difference. First operand 378 states and 842 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:18,380 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-05-22 02:34:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:18,879 INFO L93 Difference]: Finished difference Result 434 states and 931 transitions. [2021-05-22 02:34:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:34:18,879 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:18,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:18,880 INFO L225 Difference]: With dead ends: 434 [2021-05-22 02:34:18,880 INFO L226 Difference]: Without dead ends: 408 [2021-05-22 02:34:18,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1189.4ms TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:34:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-22 02:34:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 377. [2021-05-22 02:34:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.234042553191489) internal successors, (840), 376 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:18,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 840 transitions. [2021-05-22 02:34:18,883 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 840 transitions. Word has length 20 [2021-05-22 02:34:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:18,883 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 840 transitions. [2021-05-22 02:34:18,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 840 transitions. [2021-05-22 02:34:18,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:18,883 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:18,883 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:19,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6066,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:19,084 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:19,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:19,084 INFO L82 PathProgramCache]: Analyzing trace with hash 689374265, now seen corresponding path program 688 times [2021-05-22 02:34:19,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:19,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055059717] [2021-05-22 02:34:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:19,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:19,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055059717] [2021-05-22 02:34:19,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055059717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:19,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061387228] [2021-05-22 02:34:19,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:19,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:34:19,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:19,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:19,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:19,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061387228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:19,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:19,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:19,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251513000] [2021-05-22 02:34:19,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:19,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:19,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:19,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:19,718 INFO L87 Difference]: Start difference. First operand 377 states and 840 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:20,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:20,212 INFO L93 Difference]: Finished difference Result 395 states and 868 transitions. [2021-05-22 02:34:20,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:34:20,212 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:20,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:20,213 INFO L225 Difference]: With dead ends: 395 [2021-05-22 02:34:20,213 INFO L226 Difference]: Without dead ends: 388 [2021-05-22 02:34:20,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 814.5ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:34:20,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-05-22 02:34:20,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 378. [2021-05-22 02:34:20,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.236074270557029) internal successors, (843), 377 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 843 transitions. [2021-05-22 02:34:20,215 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 843 transitions. Word has length 20 [2021-05-22 02:34:20,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:20,216 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 843 transitions. [2021-05-22 02:34:20,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:20,216 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 843 transitions. [2021-05-22 02:34:20,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:20,216 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:20,216 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:20,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6081,689 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:20,416 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:20,417 INFO L82 PathProgramCache]: Analyzing trace with hash -963579109, now seen corresponding path program 689 times [2021-05-22 02:34:20,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:20,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038279372] [2021-05-22 02:34:20,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:20,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:20,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038279372] [2021-05-22 02:34:20,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038279372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:20,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60737017] [2021-05-22 02:34:20,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:20,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:34:20,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:20,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:34:20,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:21,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60737017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:21,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:21,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:21,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626686976] [2021-05-22 02:34:21,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:21,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:21,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:21,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:21,102 INFO L87 Difference]: Start difference. First operand 378 states and 843 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:21,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:21,646 INFO L93 Difference]: Finished difference Result 398 states and 872 transitions. [2021-05-22 02:34:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:34:21,646 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:21,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:21,647 INFO L225 Difference]: With dead ends: 398 [2021-05-22 02:34:21,647 INFO L226 Difference]: Without dead ends: 385 [2021-05-22 02:34:21,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 911.1ms TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:34:21,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-05-22 02:34:21,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 379. [2021-05-22 02:34:21,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.2354497354497354) internal successors, (845), 378 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:21,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 845 transitions. [2021-05-22 02:34:21,650 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 845 transitions. Word has length 20 [2021-05-22 02:34:21,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:21,650 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 845 transitions. [2021-05-22 02:34:21,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:21,650 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 845 transitions. [2021-05-22 02:34:21,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:21,650 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:21,650 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:21,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6096 [2021-05-22 02:34:21,851 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:21,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:21,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1754046457, now seen corresponding path program 690 times [2021-05-22 02:34:21,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:21,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359472991] [2021-05-22 02:34:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:22,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:22,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359472991] [2021-05-22 02:34:22,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359472991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:22,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786706570] [2021-05-22 02:34:22,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:22,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-22 02:34:22,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:22,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:34:22,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:22,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786706570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:22,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:22,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:22,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058847276] [2021-05-22 02:34:22,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:22,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:22,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:22,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:22,567 INFO L87 Difference]: Start difference. First operand 379 states and 845 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:23,288 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-05-22 02:34:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:23,541 INFO L93 Difference]: Finished difference Result 439 states and 938 transitions. [2021-05-22 02:34:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:34:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:23,541 INFO L225 Difference]: With dead ends: 439 [2021-05-22 02:34:23,541 INFO L226 Difference]: Without dead ends: 428 [2021-05-22 02:34:23,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1293.9ms TimeCoverageRelationStatistics Valid=189, Invalid=1293, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:34:23,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-05-22 02:34:23,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 380. [2021-05-22 02:34:23,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.2348284960422165) internal successors, (847), 379 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 847 transitions. [2021-05-22 02:34:23,545 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 847 transitions. Word has length 20 [2021-05-22 02:34:23,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:23,545 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 847 transitions. [2021-05-22 02:34:23,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:23,545 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 847 transitions. [2021-05-22 02:34:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:23,545 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:23,545 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:23,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6108,691 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:23,746 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:23,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:23,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1206329509, now seen corresponding path program 691 times [2021-05-22 02:34:23,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:23,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295715149] [2021-05-22 02:34:23,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:23,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:23,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295715149] [2021-05-22 02:34:23,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295715149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:23,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597236962] [2021-05-22 02:34:23,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:23,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:34:23,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:24,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597236962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:24,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:24,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:24,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185191214] [2021-05-22 02:34:24,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:24,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:24,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:24,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:24,423 INFO L87 Difference]: Start difference. First operand 380 states and 847 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:25,287 INFO L93 Difference]: Finished difference Result 444 states and 948 transitions. [2021-05-22 02:34:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:34:25,287 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:25,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:25,288 INFO L225 Difference]: With dead ends: 444 [2021-05-22 02:34:25,288 INFO L226 Difference]: Without dead ends: 418 [2021-05-22 02:34:25,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1169.0ms TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:34:25,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-05-22 02:34:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 378. [2021-05-22 02:34:25,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.236074270557029) internal successors, (843), 377 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 843 transitions. [2021-05-22 02:34:25,291 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 843 transitions. Word has length 20 [2021-05-22 02:34:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:25,291 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 843 transitions. [2021-05-22 02:34:25,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:25,291 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 843 transitions. [2021-05-22 02:34:25,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:25,291 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:25,291 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:25,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 692 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6120 [2021-05-22 02:34:25,492 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:25,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:25,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1848253249, now seen corresponding path program 692 times [2021-05-22 02:34:25,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:25,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048393876] [2021-05-22 02:34:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:25,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:25,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048393876] [2021-05-22 02:34:25,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048393876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:25,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127976666] [2021-05-22 02:34:25,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:25,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:34:25,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:25,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:34:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:26,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127976666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:26,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:26,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:26,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252348481] [2021-05-22 02:34:26,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:26,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:26,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:26,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:26,072 INFO L87 Difference]: Start difference. First operand 378 states and 843 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:26,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:26,626 INFO L93 Difference]: Finished difference Result 415 states and 908 transitions. [2021-05-22 02:34:26,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:34:26,626 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:26,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:26,626 INFO L225 Difference]: With dead ends: 415 [2021-05-22 02:34:26,626 INFO L226 Difference]: Without dead ends: 402 [2021-05-22 02:34:26,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 769.2ms TimeCoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:34:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-05-22 02:34:26,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 379. [2021-05-22 02:34:26,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.2354497354497354) internal successors, (845), 378 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 845 transitions. [2021-05-22 02:34:26,629 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 845 transitions. Word has length 20 [2021-05-22 02:34:26,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:26,629 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 845 transitions. [2021-05-22 02:34:26,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:26,629 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 845 transitions. [2021-05-22 02:34:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:26,630 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:26,630 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:26,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 693 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6133 [2021-05-22 02:34:26,830 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:26,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:26,830 INFO L82 PathProgramCache]: Analyzing trace with hash 270911519, now seen corresponding path program 693 times [2021-05-22 02:34:26,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:26,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167379043] [2021-05-22 02:34:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:26,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:26,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167379043] [2021-05-22 02:34:26,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167379043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:26,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948585615] [2021-05-22 02:34:26,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:27,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:34:27,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:27,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-22 02:34:27,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:27,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948585615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:27,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:27,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:27,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249284773] [2021-05-22 02:34:27,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:27,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:27,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:27,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:27,394 INFO L87 Difference]: Start difference. First operand 379 states and 845 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:27,989 INFO L93 Difference]: Finished difference Result 421 states and 912 transitions. [2021-05-22 02:34:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:34:27,990 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:27,990 INFO L225 Difference]: With dead ends: 421 [2021-05-22 02:34:27,990 INFO L226 Difference]: Without dead ends: 410 [2021-05-22 02:34:27,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 798.9ms TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:34:27,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-05-22 02:34:27,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 380. [2021-05-22 02:34:27,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.2348284960422165) internal successors, (847), 379 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:27,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 847 transitions. [2021-05-22 02:34:27,993 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 847 transitions. Word has length 20 [2021-05-22 02:34:27,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:27,993 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 847 transitions. [2021-05-22 02:34:27,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:27,993 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 847 transitions. [2021-05-22 02:34:27,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:27,994 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:27,994 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:28,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6145,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:28,194 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:28,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1605502849, now seen corresponding path program 694 times [2021-05-22 02:34:28,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:28,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602292551] [2021-05-22 02:34:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:28,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:28,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602292551] [2021-05-22 02:34:28,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602292551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:28,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228186340] [2021-05-22 02:34:28,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:28,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:34:28,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:28,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:34:28,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:28,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228186340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:28,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:28,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:28,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389220196] [2021-05-22 02:34:28,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:28,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:28,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:28,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:28,810 INFO L87 Difference]: Start difference. First operand 380 states and 847 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:29,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:29,893 INFO L93 Difference]: Finished difference Result 430 states and 929 transitions. [2021-05-22 02:34:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:34:29,893 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:29,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:29,893 INFO L225 Difference]: With dead ends: 430 [2021-05-22 02:34:29,893 INFO L226 Difference]: Without dead ends: 406 [2021-05-22 02:34:29,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1314.8ms TimeCoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2021-05-22 02:34:29,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-22 02:34:29,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 378. [2021-05-22 02:34:29,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.236074270557029) internal successors, (843), 377 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:29,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 843 transitions. [2021-05-22 02:34:29,896 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 843 transitions. Word has length 20 [2021-05-22 02:34:29,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:29,896 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 843 transitions. [2021-05-22 02:34:29,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 843 transitions. [2021-05-22 02:34:29,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:29,897 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:29,897 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:30,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6159,695 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:30,097 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:30,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:30,097 INFO L82 PathProgramCache]: Analyzing trace with hash 777257785, now seen corresponding path program 695 times [2021-05-22 02:34:30,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:30,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20807140] [2021-05-22 02:34:30,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:30,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:30,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20807140] [2021-05-22 02:34:30,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20807140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:30,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665826568] [2021-05-22 02:34:30,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:30,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-22 02:34:30,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:30,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:30,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:30,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665826568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:30,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:30,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:30,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416862467] [2021-05-22 02:34:30,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:30,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:30,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:30,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:30,688 INFO L87 Difference]: Start difference. First operand 378 states and 843 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:31,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:31,501 INFO L93 Difference]: Finished difference Result 430 states and 928 transitions. [2021-05-22 02:34:31,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:34:31,501 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:31,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:31,502 INFO L225 Difference]: With dead ends: 430 [2021-05-22 02:34:31,502 INFO L226 Difference]: Without dead ends: 419 [2021-05-22 02:34:31,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 999.8ms TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:34:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-05-22 02:34:31,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 379. [2021-05-22 02:34:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.2354497354497354) internal successors, (845), 378 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 845 transitions. [2021-05-22 02:34:31,505 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 845 transitions. Word has length 20 [2021-05-22 02:34:31,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:31,505 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 845 transitions. [2021-05-22 02:34:31,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:31,505 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 845 transitions. [2021-05-22 02:34:31,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:31,505 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:31,505 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:31,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6170,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:31,706 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:31,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:31,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2111849115, now seen corresponding path program 696 times [2021-05-22 02:34:31,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:31,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398964924] [2021-05-22 02:34:31,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:31,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:31,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398964924] [2021-05-22 02:34:31,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398964924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:31,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879402704] [2021-05-22 02:34:31,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:31,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:34:31,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:31,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-22 02:34:31,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:32,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879402704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:32,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:32,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:32,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518238893] [2021-05-22 02:34:32,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:32,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:32,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:32,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:32,174 INFO L87 Difference]: Start difference. First operand 379 states and 845 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:33,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:33,268 INFO L93 Difference]: Finished difference Result 458 states and 978 transitions. [2021-05-22 02:34:33,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-22 02:34:33,268 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:33,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:33,268 INFO L225 Difference]: With dead ends: 458 [2021-05-22 02:34:33,268 INFO L226 Difference]: Without dead ends: 439 [2021-05-22 02:34:33,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1133.0ms TimeCoverageRelationStatistics Valid=234, Invalid=1658, Unknown=0, NotChecked=0, Total=1892 [2021-05-22 02:34:33,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-05-22 02:34:33,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 378. [2021-05-22 02:34:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.236074270557029) internal successors, (843), 377 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 843 transitions. [2021-05-22 02:34:33,271 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 843 transitions. Word has length 20 [2021-05-22 02:34:33,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:33,271 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 843 transitions. [2021-05-22 02:34:33,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 843 transitions. [2021-05-22 02:34:33,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:33,272 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:33,272 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:33,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6182,697 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:33,473 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:33,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:33,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1573993537, now seen corresponding path program 697 times [2021-05-22 02:34:33,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:33,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217192259] [2021-05-22 02:34:33,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:33,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:33,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217192259] [2021-05-22 02:34:33,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217192259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:33,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597055402] [2021-05-22 02:34:33,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:33,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:33,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:34,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597055402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:34,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:34,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-22 02:34:34,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284987158] [2021-05-22 02:34:34,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-22 02:34:34,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:34,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-22 02:34:34,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-05-22 02:34:34,015 INFO L87 Difference]: Start difference. First operand 378 states and 843 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:34,989 INFO L93 Difference]: Finished difference Result 452 states and 965 transitions. [2021-05-22 02:34:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:34:34,990 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:34,990 INFO L225 Difference]: With dead ends: 452 [2021-05-22 02:34:34,990 INFO L226 Difference]: Without dead ends: 413 [2021-05-22 02:34:34,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1062.7ms TimeCoverageRelationStatistics Valid=245, Invalid=1561, Unknown=0, NotChecked=0, Total=1806 [2021-05-22 02:34:34,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-22 02:34:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 378. [2021-05-22 02:34:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.236074270557029) internal successors, (843), 377 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:34,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 843 transitions. [2021-05-22 02:34:34,993 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 843 transitions. Word has length 20 [2021-05-22 02:34:34,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:34,993 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 843 transitions. [2021-05-22 02:34:34,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:34,993 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 843 transitions. [2021-05-22 02:34:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:34,994 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:34,994 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:35,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6193,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:35,194 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:35,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:35,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1325841119, now seen corresponding path program 698 times [2021-05-22 02:34:35,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:35,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912687728] [2021-05-22 02:34:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:35,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:35,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912687728] [2021-05-22 02:34:35,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912687728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:35,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352302852] [2021-05-22 02:34:35,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:35,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:34:35,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:35,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:34:35,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:35,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352302852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:35,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:35,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:34:35,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794199602] [2021-05-22 02:34:35,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:34:35,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:35,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:34:35,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:34:35,882 INFO L87 Difference]: Start difference. First operand 378 states and 843 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:36,165 INFO L93 Difference]: Finished difference Result 397 states and 871 transitions. [2021-05-22 02:34:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:34:36,165 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:36,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:36,165 INFO L225 Difference]: With dead ends: 397 [2021-05-22 02:34:36,165 INFO L226 Difference]: Without dead ends: 382 [2021-05-22 02:34:36,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 642.1ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:34:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-05-22 02:34:36,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 380. [2021-05-22 02:34:36,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.2348284960422165) internal successors, (847), 379 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 847 transitions. [2021-05-22 02:34:36,168 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 847 transitions. Word has length 20 [2021-05-22 02:34:36,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:36,168 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 847 transitions. [2021-05-22 02:34:36,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:36,168 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 847 transitions. [2021-05-22 02:34:36,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:36,169 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:36,169 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:36,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6205,699 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:36,369 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:36,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:36,369 INFO L82 PathProgramCache]: Analyzing trace with hash -327112255, now seen corresponding path program 699 times [2021-05-22 02:34:36,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:36,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884210823] [2021-05-22 02:34:36,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:36,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:36,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884210823] [2021-05-22 02:34:36,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884210823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:36,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114264776] [2021-05-22 02:34:36,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:36,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-22 02:34:36,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:36,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:36,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:37,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114264776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:37,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:37,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:34:37,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540397669] [2021-05-22 02:34:37,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:34:37,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:37,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:34:37,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:34:37,071 INFO L87 Difference]: Start difference. First operand 380 states and 847 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:37,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:37,449 INFO L93 Difference]: Finished difference Result 396 states and 870 transitions. [2021-05-22 02:34:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-22 02:34:37,450 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:37,450 INFO L225 Difference]: With dead ends: 396 [2021-05-22 02:34:37,450 INFO L226 Difference]: Without dead ends: 383 [2021-05-22 02:34:37,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 726.9ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:34:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-22 02:34:37,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 381. [2021-05-22 02:34:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.2342105263157896) internal successors, (849), 380 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 849 transitions. [2021-05-22 02:34:37,453 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 849 transitions. Word has length 20 [2021-05-22 02:34:37,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:37,453 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 849 transitions. [2021-05-22 02:34:37,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 849 transitions. [2021-05-22 02:34:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:37,457 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:37,457 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:37,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6217 [2021-05-22 02:34:37,669 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:37,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:37,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1904453985, now seen corresponding path program 700 times [2021-05-22 02:34:37,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:37,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112705753] [2021-05-22 02:34:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:37,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:37,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112705753] [2021-05-22 02:34:37,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112705753] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:37,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749328025] [2021-05-22 02:34:37,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:38,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:34:38,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:38,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:38,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:38,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749328025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:38,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:38,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:34:38,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80677584] [2021-05-22 02:34:38,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:34:38,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:38,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:34:38,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:34:38,456 INFO L87 Difference]: Start difference. First operand 381 states and 849 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:39,267 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 73 [2021-05-22 02:34:39,439 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2021-05-22 02:34:39,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:39,519 INFO L93 Difference]: Finished difference Result 433 states and 929 transitions. [2021-05-22 02:34:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-22 02:34:39,519 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:39,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:39,520 INFO L225 Difference]: With dead ends: 433 [2021-05-22 02:34:39,520 INFO L226 Difference]: Without dead ends: 422 [2021-05-22 02:34:39,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1404.1ms TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2021-05-22 02:34:39,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-05-22 02:34:39,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 382. [2021-05-22 02:34:39,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.2335958005249346) internal successors, (851), 381 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:39,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 851 transitions. [2021-05-22 02:34:39,523 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 851 transitions. Word has length 20 [2021-05-22 02:34:39,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:39,523 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 851 transitions. [2021-05-22 02:34:39,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:39,523 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 851 transitions. [2021-05-22 02:34:39,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:39,523 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:39,523 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:39,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6229,701 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:39,724 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:39,724 INFO L82 PathProgramCache]: Analyzing trace with hash -569862655, now seen corresponding path program 701 times [2021-05-22 02:34:39,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:39,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646389643] [2021-05-22 02:34:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:39,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:39,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646389643] [2021-05-22 02:34:39,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646389643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:39,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876454959] [2021-05-22 02:34:39,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:39,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-22 02:34:39,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:39,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:34:39,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:40,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876454959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:40,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:40,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:34:40,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011760296] [2021-05-22 02:34:40,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:34:40,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:40,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:34:40,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:34:40,430 INFO L87 Difference]: Start difference. First operand 382 states and 851 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:40,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:40,962 INFO L93 Difference]: Finished difference Result 431 states and 929 transitions. [2021-05-22 02:34:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-22 02:34:40,962 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:40,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:40,962 INFO L225 Difference]: With dead ends: 431 [2021-05-22 02:34:40,962 INFO L226 Difference]: Without dead ends: 405 [2021-05-22 02:34:40,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 923.8ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:34:40,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-05-22 02:34:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 379. [2021-05-22 02:34:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.2354497354497354) internal successors, (845), 378 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 845 transitions. [2021-05-22 02:34:40,965 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 845 transitions. Word has length 20 [2021-05-22 02:34:40,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:40,965 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 845 transitions. [2021-05-22 02:34:40,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 845 transitions. [2021-05-22 02:34:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:40,966 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:40,966 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:41,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6241,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:41,166 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:41,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:41,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1810247193, now seen corresponding path program 702 times [2021-05-22 02:34:41,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:41,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340104474] [2021-05-22 02:34:41,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:41,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:41,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340104474] [2021-05-22 02:34:41,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340104474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:41,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098029899] [2021-05-22 02:34:41,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:41,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:34:41,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:41,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:41,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:41,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098029899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:41,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:41,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:34:41,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148469836] [2021-05-22 02:34:41,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:34:41,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:41,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:34:41,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:34:41,787 INFO L87 Difference]: Start difference. First operand 379 states and 845 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:42,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:42,356 INFO L93 Difference]: Finished difference Result 396 states and 872 transitions. [2021-05-22 02:34:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:34:42,356 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:42,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:42,357 INFO L225 Difference]: With dead ends: 396 [2021-05-22 02:34:42,357 INFO L226 Difference]: Without dead ends: 389 [2021-05-22 02:34:42,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 868.9ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-05-22 02:34:42,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-05-22 02:34:42,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 381. [2021-05-22 02:34:42,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.236842105263158) internal successors, (850), 380 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 850 transitions. [2021-05-22 02:34:42,359 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 850 transitions. Word has length 20 [2021-05-22 02:34:42,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:42,360 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 850 transitions. [2021-05-22 02:34:42,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:42,360 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 850 transitions. [2021-05-22 02:34:42,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:42,360 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:42,360 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:42,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 703 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6254 [2021-05-22 02:34:42,560 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:42,561 INFO L82 PathProgramCache]: Analyzing trace with hash 907378373, now seen corresponding path program 703 times [2021-05-22 02:34:42,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:42,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945229984] [2021-05-22 02:34:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:42,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:42,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945229984] [2021-05-22 02:34:42,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945229984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:42,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689408261] [2021-05-22 02:34:42,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:42,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:42,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:43,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689408261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:43,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:43,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:34:43,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793217277] [2021-05-22 02:34:43,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:34:43,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:43,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:34:43,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:34:43,251 INFO L87 Difference]: Start difference. First operand 381 states and 850 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:44,305 INFO L93 Difference]: Finished difference Result 442 states and 941 transitions. [2021-05-22 02:34:44,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:34:44,305 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:44,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:44,306 INFO L225 Difference]: With dead ends: 442 [2021-05-22 02:34:44,306 INFO L226 Difference]: Without dead ends: 404 [2021-05-22 02:34:44,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1315.4ms TimeCoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-05-22 02:34:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-22 02:34:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 380. [2021-05-22 02:34:44,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.2348284960422165) internal successors, (847), 379 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 847 transitions. [2021-05-22 02:34:44,309 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 847 transitions. Word has length 20 [2021-05-22 02:34:44,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:44,309 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 847 transitions. [2021-05-22 02:34:44,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 847 transitions. [2021-05-22 02:34:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:44,309 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:44,309 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:44,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6269,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:44,510 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:44,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1620919876, now seen corresponding path program 704 times [2021-05-22 02:34:44,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:44,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304229833] [2021-05-22 02:34:44,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:44,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:34:44,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:44,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304229833] [2021-05-22 02:34:44,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304229833] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:44,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60606685] [2021-05-22 02:34:44,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:44,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:34:44,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:44,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:34:44,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:34:44,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60606685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:44,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:44,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:34:44,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838290835] [2021-05-22 02:34:44,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:34:44,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:44,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:34:44,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:34:44,777 INFO L87 Difference]: Start difference. First operand 380 states and 847 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:45,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:45,199 INFO L93 Difference]: Finished difference Result 431 states and 947 transitions. [2021-05-22 02:34:45,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-22 02:34:45,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:45,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:45,200 INFO L225 Difference]: With dead ends: 431 [2021-05-22 02:34:45,200 INFO L226 Difference]: Without dead ends: 431 [2021-05-22 02:34:45,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 479.7ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-05-22 02:34:45,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-05-22 02:34:45,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 380. [2021-05-22 02:34:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.2348284960422165) internal successors, (847), 379 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 847 transitions. [2021-05-22 02:34:45,203 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 847 transitions. Word has length 20 [2021-05-22 02:34:45,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:45,203 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 847 transitions. [2021-05-22 02:34:45,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:45,203 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 847 transitions. [2021-05-22 02:34:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:45,203 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:45,203 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:45,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6281 [2021-05-22 02:34:45,404 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:45,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:45,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1413724639, now seen corresponding path program 705 times [2021-05-22 02:34:45,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:45,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166034934] [2021-05-22 02:34:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:45,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:45,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166034934] [2021-05-22 02:34:45,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166034934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:45,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478515765] [2021-05-22 02:34:45,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:45,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:34:45,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:45,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-22 02:34:45,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:45,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478515765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:45,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:45,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:34:45,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603611741] [2021-05-22 02:34:45,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:34:45,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:45,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:34:45,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:34:45,968 INFO L87 Difference]: Start difference. First operand 380 states and 847 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:46,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:46,584 INFO L93 Difference]: Finished difference Result 427 states and 926 transitions. [2021-05-22 02:34:46,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:34:46,585 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:46,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:46,585 INFO L225 Difference]: With dead ends: 427 [2021-05-22 02:34:46,585 INFO L226 Difference]: Without dead ends: 416 [2021-05-22 02:34:46,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 833.0ms TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:34:46,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-05-22 02:34:46,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 382. [2021-05-22 02:34:46,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.2335958005249346) internal successors, (851), 381 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:46,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 851 transitions. [2021-05-22 02:34:46,588 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 851 transitions. Word has length 20 [2021-05-22 02:34:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:46,588 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 851 transitions. [2021-05-22 02:34:46,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 851 transitions. [2021-05-22 02:34:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:46,589 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:46,589 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:46,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 706 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6288 [2021-05-22 02:34:46,801 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:46,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1546651327, now seen corresponding path program 706 times [2021-05-22 02:34:46,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:46,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606836562] [2021-05-22 02:34:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:46,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:46,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606836562] [2021-05-22 02:34:46,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606836562] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:46,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130792470] [2021-05-22 02:34:46,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:47,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:34:47,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:47,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:47,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:47,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130792470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:47,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:47,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:34:47,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635320784] [2021-05-22 02:34:47,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:34:47,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:47,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:34:47,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:34:47,311 INFO L87 Difference]: Start difference. First operand 382 states and 851 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:48,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:48,010 INFO L93 Difference]: Finished difference Result 444 states and 951 transitions. [2021-05-22 02:34:48,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-22 02:34:48,011 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:48,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:48,011 INFO L225 Difference]: With dead ends: 444 [2021-05-22 02:34:48,011 INFO L226 Difference]: Without dead ends: 420 [2021-05-22 02:34:48,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 847.3ms TimeCoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:34:48,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-05-22 02:34:48,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 381. [2021-05-22 02:34:48,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.2342105263157896) internal successors, (849), 380 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:48,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 849 transitions. [2021-05-22 02:34:48,014 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 849 transitions. Word has length 20 [2021-05-22 02:34:48,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:48,014 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 849 transitions. [2021-05-22 02:34:48,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:48,014 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 849 transitions. [2021-05-22 02:34:48,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:48,014 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:48,014 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:48,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6302,707 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:48,215 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:48,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:48,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2084506905, now seen corresponding path program 707 times [2021-05-22 02:34:48,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:48,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537180552] [2021-05-22 02:34:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:48,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:48,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537180552] [2021-05-22 02:34:48,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537180552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:48,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261069463] [2021-05-22 02:34:48,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:48,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:34:48,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:48,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:48,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:48,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261069463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:48,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:48,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:34:48,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901590667] [2021-05-22 02:34:48,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:34:48,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:48,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:34:48,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:34:48,742 INFO L87 Difference]: Start difference. First operand 381 states and 849 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:49,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:49,721 INFO L93 Difference]: Finished difference Result 477 states and 1007 transitions. [2021-05-22 02:34:49,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-22 02:34:49,722 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:49,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:49,722 INFO L225 Difference]: With dead ends: 477 [2021-05-22 02:34:49,722 INFO L226 Difference]: Without dead ends: 437 [2021-05-22 02:34:49,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1065.2ms TimeCoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2021-05-22 02:34:49,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-05-22 02:34:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 382. [2021-05-22 02:34:49,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.236220472440945) internal successors, (852), 381 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 852 transitions. [2021-05-22 02:34:49,725 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 852 transitions. Word has length 20 [2021-05-22 02:34:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:49,725 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 852 transitions. [2021-05-22 02:34:49,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 852 transitions. [2021-05-22 02:34:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:49,726 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:49,726 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:49,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6314,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:49,926 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:49,926 INFO L82 PathProgramCache]: Analyzing trace with hash -542790015, now seen corresponding path program 708 times [2021-05-22 02:34:49,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:49,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351151210] [2021-05-22 02:34:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:50,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:50,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351151210] [2021-05-22 02:34:50,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351151210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:50,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988851137] [2021-05-22 02:34:50,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:50,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:34:50,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:50,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:50,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:50,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988851137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:50,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:50,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:34:50,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794390732] [2021-05-22 02:34:50,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:34:50,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:50,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:34:50,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:34:50,557 INFO L87 Difference]: Start difference. First operand 382 states and 852 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:50,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:50,945 INFO L93 Difference]: Finished difference Result 399 states and 879 transitions. [2021-05-22 02:34:50,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-22 02:34:50,945 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:50,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:50,945 INFO L225 Difference]: With dead ends: 399 [2021-05-22 02:34:50,945 INFO L226 Difference]: Without dead ends: 392 [2021-05-22 02:34:50,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 680.2ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-05-22 02:34:50,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-05-22 02:34:50,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 384. [2021-05-22 02:34:50,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.2375979112271542) internal successors, (857), 383 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:50,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 857 transitions. [2021-05-22 02:34:50,948 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 857 transitions. Word has length 20 [2021-05-22 02:34:50,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:50,948 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 857 transitions. [2021-05-22 02:34:50,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 857 transitions. [2021-05-22 02:34:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:50,949 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:50,949 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:51,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6326,709 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:51,149 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:51,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:51,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2120131745, now seen corresponding path program 709 times [2021-05-22 02:34:51,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:51,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91287331] [2021-05-22 02:34:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:51,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:51,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91287331] [2021-05-22 02:34:51,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91287331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:51,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566014924] [2021-05-22 02:34:51,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:51,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:51,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:51,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566014924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:51,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:51,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:34:51,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040439445] [2021-05-22 02:34:51,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:34:51,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:51,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:34:51,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:34:51,773 INFO L87 Difference]: Start difference. First operand 384 states and 857 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:53,482 INFO L93 Difference]: Finished difference Result 493 states and 1033 transitions. [2021-05-22 02:34:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-22 02:34:53,482 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:53,482 INFO L225 Difference]: With dead ends: 493 [2021-05-22 02:34:53,483 INFO L226 Difference]: Without dead ends: 475 [2021-05-22 02:34:53,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1948.8ms TimeCoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2021-05-22 02:34:53,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-05-22 02:34:53,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 385. [2021-05-22 02:34:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.2369791666666665) internal successors, (859), 384 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 859 transitions. [2021-05-22 02:34:53,486 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 859 transitions. Word has length 20 [2021-05-22 02:34:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:53,486 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 859 transitions. [2021-05-22 02:34:53,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 859 transitions. [2021-05-22 02:34:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:53,486 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:53,486 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:53,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6341,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:53,687 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:53,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:53,687 INFO L82 PathProgramCache]: Analyzing trace with hash -785540415, now seen corresponding path program 710 times [2021-05-22 02:34:53,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:53,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748242695] [2021-05-22 02:34:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:53,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:53,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748242695] [2021-05-22 02:34:53,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748242695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:53,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882475822] [2021-05-22 02:34:53,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:53,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:34:53,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:53,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:34:53,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:54,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882475822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:54,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:54,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:34:54,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344156490] [2021-05-22 02:34:54,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:34:54,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:54,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:34:54,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:34:54,294 INFO L87 Difference]: Start difference. First operand 385 states and 859 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:55,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:55,238 INFO L93 Difference]: Finished difference Result 454 states and 968 transitions. [2021-05-22 02:34:55,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:34:55,238 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:55,238 INFO L225 Difference]: With dead ends: 454 [2021-05-22 02:34:55,239 INFO L226 Difference]: Without dead ends: 428 [2021-05-22 02:34:55,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1207.8ms TimeCoverageRelationStatistics Valid=190, Invalid=1292, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:34:55,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-05-22 02:34:55,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 386. [2021-05-22 02:34:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.2363636363636363) internal successors, (861), 385 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 861 transitions. [2021-05-22 02:34:55,242 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 861 transitions. Word has length 20 [2021-05-22 02:34:55,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:55,242 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 861 transitions. [2021-05-22 02:34:55,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:55,242 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 861 transitions. [2021-05-22 02:34:55,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:55,242 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:55,242 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:55,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 711 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6356 [2021-05-22 02:34:55,443 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:55,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:55,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1613785479, now seen corresponding path program 711 times [2021-05-22 02:34:55,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:55,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172414968] [2021-05-22 02:34:55,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:55,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:55,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172414968] [2021-05-22 02:34:55,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172414968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:55,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876691551] [2021-05-22 02:34:55,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:55,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-22 02:34:55,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:55,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-22 02:34:55,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:56,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876691551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:56,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:56,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:34:56,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712593001] [2021-05-22 02:34:56,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:34:56,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:56,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:34:56,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:34:56,134 INFO L87 Difference]: Start difference. First operand 386 states and 861 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:56,288 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-05-22 02:34:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:56,917 INFO L93 Difference]: Finished difference Result 440 states and 945 transitions. [2021-05-22 02:34:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-22 02:34:56,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:56,918 INFO L225 Difference]: With dead ends: 440 [2021-05-22 02:34:56,918 INFO L226 Difference]: Without dead ends: 429 [2021-05-22 02:34:56,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1060.0ms TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-05-22 02:34:56,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-22 02:34:56,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 388. [2021-05-22 02:34:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.235142118863049) internal successors, (865), 387 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 865 transitions. [2021-05-22 02:34:56,921 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 865 transitions. Word has length 20 [2021-05-22 02:34:56,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:56,921 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 865 transitions. [2021-05-22 02:34:56,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:56,921 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 865 transitions. [2021-05-22 02:34:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:56,922 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:56,922 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:57,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6369,712 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:57,122 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:57,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:57,122 INFO L82 PathProgramCache]: Analyzing trace with hash -279194149, now seen corresponding path program 712 times [2021-05-22 02:34:57,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:57,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385095682] [2021-05-22 02:34:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:57,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:57,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385095682] [2021-05-22 02:34:57,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385095682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:57,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033553569] [2021-05-22 02:34:57,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:57,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-22 02:34:57,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:57,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:57,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:57,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033553569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:57,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:57,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:34:57,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594548030] [2021-05-22 02:34:57,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:34:57,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:57,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:34:57,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:34:57,663 INFO L87 Difference]: Start difference. First operand 388 states and 865 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:58,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:34:58,567 INFO L93 Difference]: Finished difference Result 458 states and 983 transitions. [2021-05-22 02:34:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-22 02:34:58,568 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:34:58,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:34:58,568 INFO L225 Difference]: With dead ends: 458 [2021-05-22 02:34:58,568 INFO L226 Difference]: Without dead ends: 439 [2021-05-22 02:34:58,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1066.1ms TimeCoverageRelationStatistics Valid=163, Invalid=1319, Unknown=0, NotChecked=0, Total=1482 [2021-05-22 02:34:58,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-05-22 02:34:58,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 387. [2021-05-22 02:34:58,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.2357512953367875) internal successors, (863), 386 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 863 transitions. [2021-05-22 02:34:58,571 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 863 transitions. Word has length 20 [2021-05-22 02:34:58,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:34:58,571 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 863 transitions. [2021-05-22 02:34:58,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:34:58,571 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 863 transitions. [2021-05-22 02:34:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:34:58,572 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:34:58,572 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:34:58,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6383,713 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:58,772 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:34:58,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:34:58,772 INFO L82 PathProgramCache]: Analyzing trace with hash -817049727, now seen corresponding path program 713 times [2021-05-22 02:34:58,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:34:58,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971192725] [2021-05-22 02:34:58,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:34:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:34:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:58,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:34:58,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971192725] [2021-05-22 02:34:58,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971192725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:58,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011405569] [2021-05-22 02:34:58,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:34:58,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-22 02:34:58,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:34:58,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-22 02:34:58,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:34:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:34:59,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011405569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:34:59,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:34:59,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:34:59,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386048735] [2021-05-22 02:34:59,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:34:59,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:34:59,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:34:59,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:34:59,303 INFO L87 Difference]: Start difference. First operand 387 states and 863 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:00,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:35:00,095 INFO L93 Difference]: Finished difference Result 451 states and 973 transitions. [2021-05-22 02:35:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-22 02:35:00,095 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:35:00,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:35:00,096 INFO L225 Difference]: With dead ends: 451 [2021-05-22 02:35:00,096 INFO L226 Difference]: Without dead ends: 425 [2021-05-22 02:35:00,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 885.5ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-05-22 02:35:00,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-05-22 02:35:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 389. [2021-05-22 02:35:00,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.2371134020618557) internal successors, (868), 388 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:00,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 868 transitions. [2021-05-22 02:35:00,099 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 868 transitions. Word has length 20 [2021-05-22 02:35:00,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:35:00,099 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 868 transitions. [2021-05-22 02:35:00,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:00,099 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 868 transitions. [2021-05-22 02:35:00,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:35:00,099 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:35:00,099 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:35:00,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 714 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6395 [2021-05-22 02:35:00,300 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:35:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:35:00,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1198046879, now seen corresponding path program 714 times [2021-05-22 02:35:00,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:35:00,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90761952] [2021-05-22 02:35:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:35:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:35:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:35:00,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:35:00,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90761952] [2021-05-22 02:35:00,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90761952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:35:00,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237976351] [2021-05-22 02:35:00,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:35:00,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-22 02:35:00,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:35:00,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-22 02:35:00,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:35:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:35:00,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237976351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:35:00,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:35:00,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-22 02:35:00,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141879967] [2021-05-22 02:35:00,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-22 02:35:00,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:35:00,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-22 02:35:00,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-05-22 02:35:00,935 INFO L87 Difference]: Start difference. First operand 389 states and 868 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:02,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:35:02,019 INFO L93 Difference]: Finished difference Result 468 states and 989 transitions. [2021-05-22 02:35:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-22 02:35:02,019 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:35:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:35:02,020 INFO L225 Difference]: With dead ends: 468 [2021-05-22 02:35:02,020 INFO L226 Difference]: Without dead ends: 461 [2021-05-22 02:35:02,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1291.7ms TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-05-22 02:35:02,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-22 02:35:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 390. [2021-05-22 02:35:02,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.2416452442159382) internal successors, (872), 389 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 872 transitions. [2021-05-22 02:35:02,023 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 872 transitions. Word has length 20 [2021-05-22 02:35:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:35:02,023 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 872 transitions. [2021-05-22 02:35:02,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 872 transitions. [2021-05-22 02:35:02,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:35:02,024 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:35:02,024 INFO L521 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:35:02,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6407,715 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:35:02,224 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:35:02,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:35:02,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1881553562, now seen corresponding path program 715 times [2021-05-22 02:35:02,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:35:02,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574839286] [2021-05-22 02:35:02,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:35:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:35:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:35:02,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:35:02,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574839286] [2021-05-22 02:35:02,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574839286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:35:02,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038756382] [2021-05-22 02:35:02,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:35:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:35:02,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-22 02:35:02,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:35:02,641 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-22 02:35:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:35:02,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038756382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:35:02,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:35:02,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-22 02:35:02,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773820948] [2021-05-22 02:35:02,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-22 02:35:02,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:35:02,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-22 02:35:02,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:35:02,673 INFO L87 Difference]: Start difference. First operand 390 states and 872 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:02,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:35:02,811 INFO L93 Difference]: Finished difference Result 397 states and 884 transitions. [2021-05-22 02:35:02,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-22 02:35:02,811 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-22 02:35:02,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:35:02,812 INFO L225 Difference]: With dead ends: 397 [2021-05-22 02:35:02,812 INFO L226 Difference]: Without dead ends: 397 [2021-05-22 02:35:02,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-22 02:35:02,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-05-22 02:35:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 383. [2021-05-22 02:35:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.243455497382199) internal successors, (857), 382 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:02,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 857 transitions. [2021-05-22 02:35:02,815 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 857 transitions. Word has length 20 [2021-05-22 02:35:02,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:35:02,815 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 857 transitions. [2021-05-22 02:35:02,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:35:02,815 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 857 transitions. [2021-05-22 02:35:02,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-22 02:35:02,815 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:35:02,815 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:35:03,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 716 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6420 [2021-05-22 02:35:03,016 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:35:03,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:35:03,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1762329087, now seen corresponding path program 716 times [2021-05-22 02:35:03,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:35:03,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117292010] [2021-05-22 02:35:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:35:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:35:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:35:03,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:35:03,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117292010] [2021-05-22 02:35:03,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117292010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:35:03,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175380998] [2021-05-22 02:35:03,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:35:03,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:35:03,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:35:03,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-22 02:35:03,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-05-22 02:35:03,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6428,717 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:35:03,457 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-22 02:35:03,458 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2021-05-22 02:35:03,460 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-05-22 02:35:03,460 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:35:03,460 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:35:03,460 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:35:03,460 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:35:03,460 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:35:03,460 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:35:03,460 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:35:03,460 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-22 02:35:03,461 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-05-22 02:35:03,461 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-22 02:35:03,461 INFO L315 ceAbstractionStarter]: Result for error location InUseError was TIMEOUT (2/2) [2021-05-22 02:35:03,461 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-22 02:35:03,463 WARN L196 ceAbstractionStarter]: Timeout [2021-05-22 02:35:03,463 INFO L202 PluginConnector]: Adding new model chromosome-opt-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.05 02:35:03 BasicIcfg [2021-05-22 02:35:03,463 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-22 02:35:03,463 INFO L168 Benchmark]: Toolchain (without parser) took 867274.21 ms. Allocated memory was 352.3 MB in the beginning and 509.6 MB in the end (delta: 157.3 MB). Free memory was 331.6 MB in the beginning and 371.7 MB in the end (delta: -40.1 MB). Peak memory consumption was 117.3 MB. Max. memory is 16.0 GB. [2021-05-22 02:35:03,464 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 352.3 MB. Free memory was 332.8 MB in the beginning and 332.7 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:35:03,464 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.40 ms. Allocated memory is still 352.3 MB. Free memory was 331.5 MB in the beginning and 330.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:35:03,464 INFO L168 Benchmark]: Boogie Preprocessor took 27.21 ms. Allocated memory is still 352.3 MB. Free memory was 330.0 MB in the beginning and 329.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:35:03,464 INFO L168 Benchmark]: RCFGBuilder took 300.06 ms. Allocated memory is still 352.3 MB. Free memory was 329.0 MB in the beginning and 333.8 MB in the end (delta: -4.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.0 GB. [2021-05-22 02:35:03,464 INFO L168 Benchmark]: TraceAbstraction took 866914.68 ms. Allocated memory was 352.3 MB in the beginning and 509.6 MB in the end (delta: 157.3 MB). Free memory was 333.8 MB in the beginning and 371.7 MB in the end (delta: -37.9 MB). Peak memory consumption was 119.4 MB. Max. memory is 16.0 GB. [2021-05-22 02:35:03,464 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 352.3 MB. Free memory was 332.8 MB in the beginning and 332.7 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.40 ms. Allocated memory is still 352.3 MB. Free memory was 331.5 MB in the beginning and 330.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 27.21 ms. Allocated memory is still 352.3 MB. Free memory was 330.0 MB in the beginning and 329.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 300.06 ms. Allocated memory is still 352.3 MB. Free memory was 329.0 MB in the beginning and 333.8 MB in the end (delta: -4.9 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 866914.68 ms. Allocated memory was 352.3 MB in the beginning and 509.6 MB in the end (delta: 157.3 MB). Free memory was 333.8 MB in the beginning and 371.7 MB in the end (delta: -37.9 MB). Peak memory consumption was 119.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 866851.7ms, OverallIterations: 723, TraceHistogramMax: 5, EmptinessCheckTime: 206.3ms, AutomataDifference: 397134.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20431 SDtfs, 45517 SDslu, 178144 SDs, 0 SdLazy, 295259 SolverSat, 17257 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 109880.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26717 GetRequests, 8163 SyntacticMatches, 1 SemanticMatches, 18553 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93759 ImplicationChecksByTransitivity, 504202.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=390occurred in iteration=721, InterpolantAutomatonStates: 12574, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1439.9ms AutomataMinimizationTime, 722 MinimizatonAttempts, 26399 StatesRemovedByMinimization, 709 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2787.1ms SsaConstructionTime, 11235.9ms SatisfiabilityAnalysisTime, 296215.7ms InterpolantComputationTime, 26707 NumberOfCodeBlocks, 26707 NumberOfCodeBlocksAsserted, 2538 NumberOfCheckSat, 25270 ConstructedInterpolants, 2 QuantifiedInterpolants, 434953 SizeOfPredicates, 7865 NumberOfNonLiveVariables, 69731 ConjunctsInSsa, 25875 ConjunctsInUnsatCore, 1437 InterpolantComputations, 7 PerfectInterpolantSequences, 1802/21289 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 1.2ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown